|
Interesting residue from a Sharpie or Magic Marker on a mirror that I cannot remove before aluminizing it!
Here's how it happened: David C is making a 12.5" mirror and based on ronchi and foucault/couder zonal readings, it looks pretty good. We tried using a wire test, and to do so, I used a Magic Marker to draw a chord or diameter and marked some points on it. (Saw professionals at NuTek near Baltimore do the same thing, thought it couldn't hurt.
We then tried to do star testing. However, trying to do that outside when uncoated was a nightmare. So I figured it would be asier if I did a quick-and-dirty coating in our Consolidated Electrodynamics vacuum chamber and alumizer, vintage mid-1960s. Literally "quick and dirty" because I didn't even wash it off. The aluminum stuck just fine, but you could see our fingerprints and the Sharpie line through the aluminum. Did some more testing.
Yesterday, we decided to do a real coating. ?So we got out the 'green river' and the paper towels and stood outside in the snow and cold and watched Venus and Mars do their slow evening dance whille the aluminum came off, which it did.
Then we took the mirror into the CCCC kitchen to clean off anything remaining (and warm up) using our regular agents: Alconox powder and powdered USP calcium carbonate (separately) with water and cotton balls.
Guess what?
We could still see, clearly, where I had drawn the line with the permanent marker, despite repeated washings and scrubbings.
We even tried laquer thinner. ?No change. We haven't tried acetone, because we were out, and intend to do so, but at this point I'm not sure it will work either... Methyl Ethyl Ketone? I sure hope it doesn't need polishing again, because figuring a 12.5" mirror is a WHOLE lot of work.
Weird.
Anybody have comments or ideas? ? Guy Brandenburg, Washington, DC? guysmathastro.wordpress.com
http://gfbrandenburg.wordpress.com/
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
============================
|
Guy,
Are you sure the marker tip didn't in fact "polish" a groove into
the surface? Some of the felt tip markers use fibre glass for the
tip so it might be more abrasive than you expect. Just a thought.
Thomas.
On 22/02/2015 2:43 AM, Guy Brandenburg gfbrandenburg@...
[VacuumX] wrote:
toggle quoted message
Show quoted text
?
Interesting
residue from a Sharpie or Magic Marker on a mirror
that I cannot remove before aluminizing it!
Here's how it
happened: David C is making a 12.5" mirror and based
on ronchi and foucault/couder zonal readings, it looks
pretty good. We tried using a wire test, and to do so,
I used a Magic Marker to draw a chord or diameter and
marked some points on it. (Saw professionals at NuTek
near Baltimore do the same thing, thought it couldn't
hurt.
We
then tried to do star testing. However, trying to do
that outside when uncoated was a nightmare. So I
figured it would be asier if I did a quick-and-dirty
coating in our Consolidated Electrodynamics vacuum
chamber and alumizer, vintage mid-1960s. Literally
"quick and dirty" because I didn't even wash it off.
The aluminum stuck just fine, but you could see our
fingerprints and the Sharpie line through the
aluminum. Did some more testing.
Yesterday,
we decided to do a real coating. ?So we got out the
'green river' and the paper towels and stood outside
in the snow and cold and watched Venus and Mars do
their slow evening dance whille the aluminum came off,
which it did.
Then we took the
mirror into the CCCC kitchen to clean off anything
remaining (and warm up) using our regular agents:
Alconox powder and powdered USP calcium carbonate
(separately) with water and cotton balls.
Guess
what?
We could still
see, clearly, where I had drawn the line with the
permanent marker, despite repeated washings and
scrubbings.
We even tried
laquer thinner. ?No change. We haven't tried acetone,
because we were out, and intend to do so, but at this
point I'm not sure it will work either... Methyl Ethyl
Ketone? I sure hope it doesn't need polishing again,
because figuring a 12.5" mirror is a WHOLE lot of
work.
Weird.
Anybody
have comments or ideas?
?
Guy
Brandenburg, Washington, DC?
guysmathastro.wordpress.com
============================
|
On 02/21/2015 05:37 PM, Thomas Janstrom t_janstrom@... [VacuumX] wrote: Guy,
Are you sure the marker tip didn't in fact "polish" a groove into the
surface? Some of the felt tip markers use fibre glass for the tip so it
might be more abrasive than you expect. Just a thought.
Thomas. I wonder if the type of glass might be a factor? -- Kirk Wallace
|
Moving up in chemical agression towards the dye would be methyl cloride..... or methyline cloride.... found in Dads Old Fasion Paint Stripper. ?Neither are caustic.
Sent via the Samsung Galaxy Note? II, an AT&T 4G LTE smartphone
toggle quoted message
Show quoted text
-------- Original message -------- From: "Guy Brandenburg gfbrandenburg@... [VacuumX]" Date:02/21/2015 11:43 AM (GMT-05:00) To: vacuumx@... Cc: David Collins Subject: [VacuumX] weird Sharpie residue
?
Interesting residue from a Sharpie or Magic Marker on a mirror that I cannot remove before aluminizing it!
Here's how it happened: David C is making a 12.5" mirror and based on ronchi and foucault/couder zonal readings, it looks pretty good. We tried using a wire test, and to do so, I used a Magic Marker to draw a chord or diameter and marked some points on it. (Saw professionals at NuTek near Baltimore do the same thing, thought it couldn't hurt.
We then tried to do star testing. However, trying to do that outside when uncoated was a nightmare. So I figured it would be asier if I did a quick-and-dirty coating in our Consolidated Electrodynamics vacuum chamber and alumizer, vintage mid-1960s. Literally "quick and dirty" because I didn't even wash it off. The aluminum stuck just fine, but you could see our fingerprints and the Sharpie line through the aluminum. Did some more testing.
Yesterday, we decided to do a real coating. ?So we got out the 'green river' and the paper towels and stood outside in the snow and cold and watched Venus and Mars do their slow evening dance whille the aluminum came off, which it did.
Then we took the mirror into the CCCC kitchen to clean off anything remaining (and warm up) using our regular agents: Alconox powder and powdered USP calcium carbonate (separately) with water and cotton balls.
Guess what?
We could still see, clearly, where I had drawn the line with the permanent marker, despite repeated washings and scrubbings.
We even tried laquer thinner. ?No change. We haven't tried acetone, because we were out, and intend to do so, but at this point I'm not sure it will work either... Methyl Ethyl Ketone? I sure hope it doesn't need polishing again, because figuring a 12.5" mirror is a WHOLE lot of work.
Weird.
Anybody have comments or ideas? ? Guy Brandenburg, Washington, DC? guysmathastro.wordpress.com
http://gfbrandenburg.wordpress.com/
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
============================
|
The surface roughness of the glass might be a factor.
Christopher Erickson
Consulting Engineer
Summit Kinetics
Waikoloa, HI 96738
www.summitkinetics.com
toggle quoted message
Show quoted text
-----Original Message----- From: VacuumX@... [mailto:VacuumX@...] Sent: Saturday, February 21, 2015 3:52 PM To: VacuumX@... Subject: Re: [VacuumX] weird Sharpie residue On 02/21/2015 05:37 PM, Thomas Janstrom t_janstrom@... [VacuumX] wrote: Guy,
Are you sure the marker tip didn't in fact "polish" a groove into the
surface? Some of the felt tip markers use fibre glass for the tip so it
might be more abrasive than you expect. Just a thought.
Thomas. I wonder if the type of glass might be a factor? -- Kirk Wallace ------------------------------------ Posted by: Kirk Wallace <kwallace@...> ------------------------------------ ------------------------------------ Yahoo Groups Links
|
I doubt it.? ? Guy Brandenburg, Washington, DC?
http://gfbrandenburg.wordpress.com/
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
============================
From: "Thomas Janstrom t_janstrom@... [VacuumX]" To: VacuumX@...
Sent: Saturday, February 21, 2015 8:37 PM
Subject: Re: [VacuumX] weird Sharpie residue
?
Guy,
Are you sure the marker tip didn't in fact "polish" a groove into
the surface? Some of the felt tip markers use fibre glass for the
tip so it might be more abrasive than you expect. Just a thought.
Thomas.
On 22/02/2015 2:43 AM, Guy Brandenburg gfbrandenburg@...
[VacuumX] wrote:
?
Interesting
residue from a Sharpie or Magic Marker on a mirror
that I cannot remove before aluminizing it!
Here's how it
happened: David C is making a 12.5" mirror and based
on ronchi and foucault/couder zonal readings, it looks
pretty good. We tried using a wire test, and to do so,
I used a Magic Marker to draw a chord or diameter and
marked some points on it. (Saw professionals at NuTek
near Baltimore do the same thing, thought it couldn't
hurt.
We
then tried to do star testing. However, trying to do
that outside when uncoated was a nightmare. So I
figured it would be asier if I did a quick-and-dirty
coating in our Consolidated Electrodynamics vacuum
chamber and alumizer, vintage mid-1960s. Literally
"quick and dirty" because I didn't even wash it off.
The aluminum stuck just fine, but you could see our
fingerprints and the Sharpie line through the
aluminum. Did some more testing.
Yesterday,
we decided to do a real coating. ?So we got out the
'green river' and the paper towels and stood outside
in the snow and cold and watched Venus and Mars do
their slow evening dance whille the aluminum came off,
which it did.
Then we took the
mirror into the CCCC kitchen to clean off anything
remaining (and warm up) using our regular agents:
Alconox powder and powdered USP calcium carbonate
(separately) with water and cotton balls.
Guess
what?
We could still
see, clearly, where I had drawn the line with the
permanent marker, despite repeated washings and
scrubbings.
We even tried
laquer thinner. ?No change. We haven't tried acetone,
because we were out, and intend to do so, but at this
point I'm not sure it will work either... Methyl Ethyl
Ketone? I sure hope it doesn't need polishing again,
because figuring a 12.5" mirror is a WHOLE lot of
work.
Weird.
Anybody
have comments or ideas?
?
Guy
Brandenburg, Washington, DC?
guysmathastro.wordpress.com
============================
|
Was the Sharpie a "dry marker" or a
"permanent marker?" I imagine the residue from a dry marker would
be carbon and that the solvent from a permanent marker to be much
more aggressive. I suspect you have permanently etched the glass.
Salt from fingerprints will etch the glass as will any alkaline
material.
Don
On 2/21/15 9:05 PM, Andrew Aurigema eosraptor@... [VacuumX]
wrote:
toggle quoted message
Show quoted text
Moving up in chemical agression towards the dye would be
methyl cloride..... or methyline cloride.... found in Dads Old
Fasion Paint Stripper. ?Neither are caustic.
Sent via the Samsung
Galaxy Note? II, an AT&T 4G LTE smartphone
-------- Original message --------
Date:02/21/2015 11:43 AM (GMT-05:00)
Cc: David Collins
Subject: [VacuumX] weird Sharpie residue
?
Interesting residue
from a Sharpie or Magic Marker on a mirror that I cannot
remove before aluminizing it!
Here's how it
happened: David C is making a 12.5" mirror and based on
ronchi and foucault/couder zonal readings, it looks pretty
good. We tried using a wire test, and to do so, I used a
Magic Marker to draw a chord or diameter and marked some
points on it. (Saw professionals at NuTek near Baltimore
do the same thing, thought it couldn't hurt.
We
then tried to do star testing. However, trying to do that
outside when uncoated was a nightmare. So I figured it
would be asier if I did a quick-and-dirty coating in our
Consolidated Electrodynamics vacuum chamber and alumizer,
vintage mid-1960s. Literally "quick and dirty" because I
didn't even wash it off. The aluminum stuck just fine, but
you could see our fingerprints and the Sharpie line
through the aluminum. Did some more testing.
Yesterday,
we decided to do a real coating. ?So we got out the 'green
river' and the paper towels and stood outside in the snow
and cold and watched Venus and Mars do their slow evening
dance whille the aluminum came off, which it did.
Then we took the
mirror into the CCCC kitchen to clean off anything
remaining (and warm up) using our regular agents: Alconox
powder and powdered USP calcium carbonate (separately)
with water and cotton balls.
Guess
what?
We could still see,
clearly, where I had drawn the line with the permanent
marker, despite repeated washings and scrubbings.
We even tried laquer
thinner. ?No change. We haven't tried acetone, because we
were out, and intend to do so, but at this point I'm not
sure it will work either... Methyl Ethyl Ketone? I sure
hope it doesn't need polishing again, because figuring a
12.5" mirror is a WHOLE lot of work.
Weird.
Anybody
have comments or ideas?
?
Guy Brandenburg,
Washington, DC?
guysmathastro.wordpress.com
============================
|
It was a permanent marker. I?
toggle quoted message
Show quoted text
On Feb 23, 2015, at 9:34 AM, Don Mattox donmattox@... [VacuumX] < VacuumX@...> wrote:
?
Was the Sharpie a "dry marker" or a
"permanent marker?" I imagine the residue from a dry marker would
be carbon and that the solvent from a permanent marker to be much
more aggressive. I suspect you have permanently etched the glass.
Salt from fingerprints will etch the glass as will any alkaline
material.
Don
On 2/21/15 9:05 PM, Andrew Aurigema eosraptor@... [VacuumX]
wrote:
Moving up in chemical agression towards the dye would be
methyl cloride..... or methyline cloride.... found in Dads Old
Fasion Paint Stripper. ?Neither are caustic.
Sent via the Samsung
Galaxy Note? II, an AT&T 4G LTE smartphone
-------- Original message --------
Date:02/21/2015 11:43 AM (GMT-05:00)
Cc: David Collins
Subject: [VacuumX] weird Sharpie residue
?
Interesting residue
from a Sharpie or Magic Marker on a mirror that I cannot
remove before aluminizing it!
Here's how it
happened: David C is making a 12.5" mirror and based on
ronchi and foucault/couder zonal readings, it looks pretty
good. We tried using a wire test, and to do so, I used a
Magic Marker to draw a chord or diameter and marked some
points on it. (Saw professionals at NuTek near Baltimore
do the same thing, thought it couldn't hurt.
We
then tried to do star testing. However, trying to do that
outside when uncoated was a nightmare. So I figured it
would be asier if I did a quick-and-dirty coating in our
Consolidated Electrodynamics vacuum chamber and alumizer,
vintage mid-1960s. Literally "quick and dirty" because I
didn't even wash it off. The aluminum stuck just fine, but
you could see our fingerprints and the Sharpie line
through the aluminum. Did some more testing.
Yesterday,
we decided to do a real coating. ?So we got out the 'green
river' and the paper towels and stood outside in the snow
and cold and watched Venus and Mars do their slow evening
dance whille the aluminum came off, which it did.
Then we took the
mirror into the CCCC kitchen to clean off anything
remaining (and warm up) using our regular agents: Alconox
powder and powdered USP calcium carbonate (separately)
with water and cotton balls.
Guess
what?
We could still see,
clearly, where I had drawn the line with the permanent
marker, despite repeated washings and scrubbings.
We even tried laquer
thinner. ?No change. We haven't tried acetone, because we
were out, and intend to do so, but at this point I'm not
sure it will work either... Methyl Ethyl Ketone? I sure
hope it doesn't need polishing again, because figuring a
12.5" mirror is a WHOLE lot of work.
Weird.
Anybody
have comments or ideas?
?
Guy Brandenburg,
Washington, DC?
============================
|
A person who uses a permanent marker on a surface, no matter how
precious, ought to expect it to be permanent. Sadly.
Brian Whatcott
toggle quoted message
Show quoted text
Interesting residue
from a Sharpie or Magic Marker on a mirror that I cannot
remove before aluminizing it!
/snip/
Anybody
have comments or ideas?
?
Guy Brandenburg,
Washington, DC
|
That's also weird. In the past I found that "permanent" magic ?markers or sharpies came off of glass -- Pyrex or float -- in soap and water or even with handling.not this time!!
toggle quoted message
Show quoted text
On Feb 23, 2015, at 12:15 PM, brian whatcott betwys1@... [VacuumX] < VacuumX@...> wrote:
?
A person who uses a permanent marker on a surface, no matter how
precious, ought to expect it to be permanent. Sadly.
Brian Whatcott
Interesting residue
from a Sharpie or Magic Marker on a mirror that I cannot
remove before aluminizing it!
/snip/
Anybody
have comments or ideas?
?
Guy Brandenburg,
Washington, DC
|
The only time Sharpie marker dont come off a mirror I am working on is when the mirror is not fully polished out.? Even a mirror that looks polished can still have quite a rough surface that traps dye or lets it get under the top layer of glass.? I have put on squiggle lines that took hours of polishing to fully remove because the dye got under the top layer of glass.? Till that top layer is polished off the marks remained. ?
I would be inclined to polish the surface and remove the marks. ?
Can you take a pic or two of the inside of your chamber so we can see what "classic vac" looks like ???
Drew in sunny Florida ??
On Mon, Feb 23, 2015 at 12:32 PM, Guy Brandenburg gfbrandenburg@... [VacuumX] <VacuumX@...> wrote:
?
That's also weird. In the past I found that "permanent" magic ?markers or sharpies came off of glass -- Pyrex or float -- in soap and water or even with handling.not this time!!
?
A person who uses a permanent marker on a surface, no matter how
precious, ought to expect it to be permanent. Sadly.
Brian Whatcott
Interesting residue
from a Sharpie or Magic Marker on a mirror that I cannot
remove before aluminizing it!
/snip/
Anybody
have comments or ideas?
?
Guy Brandenburg,
Washington, DC
|
On 02/23/2015 09:55 AM, Andrew Aurigema eosraptor@... [VacuumX] wrote: The only time Sharpie marker dont come off a mirror I am working on is
when the mirror is not fully polished out. Even a mirror that looks
polished can still have quite a rough surface that traps dye or lets it
get under the top layer of glass. I have put on squiggle lines that
took hours of polishing to fully remove because the dye got under the
top layer of glass. Till that top layer is polished off the marks
remained. Good call Drew, I wonder if the mirror passed the laser pointer test? ( ) -- Kirk Wallace
|
Agreed.? If the marker isn't coming off then the mirror
polishing isn't finished.
?
?
Christopher Erickson
Consulting
Engineer
Summit Kinetics
Waikoloa, HI
96738
www.summitkinetics.com
?
toggle quoted message
Show quoted text
The only time Sharpie marker dont come off a mirror I am working on
is when the mirror is not fully polished out.? Even a mirror that looks
polished can still have quite a rough surface that traps dye or lets it get
under the top layer of glass.? I have put on squiggle lines that took hours
of polishing to fully remove because the dye got under the top layer of
glass.? Till that top layer is polished off the marks remained. ?
I would be inclined to polish the surface and remove the marks.
?
Can you take a pic or two of the inside of your chamber so we can see what
"classic vac" looks like ???
Drew in sunny Florida
??
|
1. You cannot see the marks at all with the naked eye. AT ALL.
2. ?I believe the mirror is fully polished.?
3. The only way I can tell something weird is going on is after we've washed the mirror thoroughly with Alconox and/or powdered calcium carbonate and rinsed it thoroughly and let the water flow off: What happens then is that the line and marks that I drew re-appear as if a magical water-mark arose where the marks used to be. I didn't take any photos at the time. I should say, "water-mark descended" rather than "arose": the sheet of water was very uniform except that it was a little thinner where the marks used to be. You could read the markings very clearly as if there was a scar on the surface of the water. Not at all visible in any way on the dry glass.? ? Guy Brandenburg, Washington, DC?
http://gfbrandenburg.wordpress.com/
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
============================
From: "'Christopher Erickson' christopher.k.erickson@... [VacuumX]"
To: VacuumX@...
Sent: Monday, February 23, 2015 3:43 PM
Subject: RE: [VacuumX] weird Sharpie residue
?
Agreed.? If the marker isn't coming off then the mirror
polishing isn't finished.
?
?
Christopher Erickson
Consulting
Engineer
Summit Kinetics
Waikoloa, HI
96738
www.summitkinetics.com
?
The only time Sharpie marker dont come off a mirror I am working on
is when the mirror is not fully polished out.? Even a mirror that looks
polished can still have quite a rough surface that traps dye or lets it get
under the top layer of glass.? I have put on squiggle lines that took hours
of polishing to fully remove because the dye got under the top layer of
glass.? Till that top layer is polished off the marks remained. ?
I would be inclined to polish the surface and remove the marks.
?
Can you take a pic or two of the inside of your chamber so we can see what
"classic vac" looks like ???
Drew in sunny Florida
??
|
Could still be micro-fractures.
?
One thing I do is use a 3-5mw green laser pointer.? I hit the
mirror at an angle and if I can see a green dot on the surface of the mirror
then I know that I am not done polishing.
?
?
Christopher
Erickson
Consulting Engineer
Summit Kinetics
Waikoloa, HI
96738
www.summitkinetics.com
?
toggle quoted message
Show quoted text
1. You cannot see the marks at all with the
naked eye. AT ALL.
2. ?I believe the
mirror is fully polished.?
3. The only way I can
tell something weird is going on is after we've washed the mirror thoroughly
with Alconox and/or powdered calcium carbonate and rinsed it thoroughly and let
the water flow off: What happens then is that the line and marks that I
drew re-appear as if a magical water-mark arose where the marks used to be. I
didn't take any photos at the time. I should say, "water-mark descended" rather
than "arose": the sheet of water was very uniform except that it was a little
thinner where the marks used to be. You could read the markings very clearly as
if there was a scar on the surface of the water. Not at all visible in any way
on the dry glass.?
?
Guy Brandenburg, Washington,
DC?
http://gfbrandenburg.wordpress.com/
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
============================
From:
"'Christopher Erickson' christopher.k.erickson@... [VacuumX]"
To: VacuumX@...
Sent: Monday, February 23, 2015 3:43
PM
Subject: RE: [VacuumX] weird
Sharpie residue
?
Agreed.? If the marker isn't coming off then the
mirror polishing isn't finished.
?
?
Christopher Erickson
Consulting
Engineer
Summit Kinetics
Waikoloa, HI 96738
www.summitkinetics.com
?
The only time Sharpie marker
dont come off a mirror I am working on is when the mirror is not fully polished
out.? Even a mirror that looks polished can still have quite a rough
surface that traps dye or lets it get under the top layer of glass.? I have
put on squiggle lines that took hours of polishing to fully remove because the
dye got under the top layer of glass.? Till that top layer is polished off
the marks remained. ?
I would be inclined to polish the surface and remove the marks.
?
Can you take a pic or two of the inside of your chamber so we can see what
"classic vac" looks like ???
Drew in sunny Florida
??
|
I asked about the laser pointer test 12 days ago.
Christopher Erickson
Consulting Engineer
Summit Kinetics
Waikoloa, HI 96738
www.summitkinetics.com
toggle quoted message
Show quoted text
-----Original Message----- From: VacuumX@... [mailto:VacuumX@...] Sent: Monday, February 23, 2015 8:35 AM To: VacuumX@... Subject: Re: [VacuumX] weird Sharpie residue On 02/23/2015 09:55 AM, Andrew Aurigema eosraptor@... [VacuumX] wrote: The only time Sharpie marker dont come off a mirror I am working on is
when the mirror is not fully polished out. Even a mirror that looks
polished can still have quite a rough surface that traps dye or lets it
get under the top layer of glass. I have put on squiggle lines that
took hours of polishing to fully remove because the dye got under the
top layer of glass. Till that top layer is polished off the marks
remained. Good call Drew, I wonder if the mirror passed the laser pointer test? ( ) -- Kirk Wallace ------------------------------------ Posted by: Kirk Wallace <kwallace@...> ------------------------------------ ------------------------------------ Yahoo Groups Links
|
Sorry. It of course passed the laser test.?
toggle quoted message
Show quoted text
On Mar 8, 2015, at 4:05 AM, 'Christopher Erickson' christopher.k.erickson@... [VacuumX] < VacuumX@...> wrote:
?
I asked about the laser pointer test 12 days ago.
Christopher Erickson
Consulting Engineer
Summit Kinetics
Waikoloa, HI 96738
-----Original Message-----
From: VacuumX@... [mailto:VacuumX@...]
Sent: Monday, February 23, 2015 8:35 AM
To: VacuumX@...
Subject: Re: [VacuumX] weird Sharpie residue
On 02/23/2015 09:55 AM, Andrew Aurigema eosraptor@... [VacuumX] wrote:
> The only time Sharpie marker dont come off a mirror I am working on is
> when the mirror is not fully polished out. Even a mirror that looks
> polished can still have quite a rough surface that traps dye or lets it
> get under the top layer of glass. I have put on squiggle lines that
> took hours of polishing to fully remove because the dye got under the
> top layer of glass. Till that top layer is polished off the marks
> remained.
Good call Drew, I wonder if the mirror passed the laser pointer test?
( )
--
Kirk Wallace
------------------------------------
Posted by: Kirk Wallace <kwallace@...>
------------------------------------
------------------------------------
Yahoo Groups Links
|
It was easy to remove the sharpie before we Aluminized it. We purposely decided to do a Quick and Dirty aluminizing insatiable. I didn't consider the fact that the vaporized aluminum would be v ry very hot and *pyrolize* the black sharpie marks and our fingerprints. But it did. So David is refiguring. No more quick and dirty aluminizationsfor me.
toggle quoted message
Show quoted text
On Feb 23, 2015, at 1:34 PM, Kirk Wallace kwallace@... [VacuumX] < VacuumX@...> wrote:
?
On 02/23/2015 09:55 AM, Andrew Aurigema eosraptor@... [VacuumX] wrote:
> The only time Sharpie marker dont come off a mirror I am working on is
> when the mirror is not fully polished out. Even a mirror that looks
> polished can still have quite a rough surface that traps dye or lets it
> get under the top layer of glass. I have put on squiggle lines that
> took hours of polishing to fully remove because the dye got under the
> top layer of glass. Till that top layer is polished off the marks
> remained.
Good call Drew, I wonder if the mirror passed the laser pointer test?
( )
--
Kirk Wallace
|
Kirk Wallace
Christopher Erickson