14 Nov
2004
14 Nov
'04
1:31 p.m.
Does anyone have codes - Pantone numbers, or something like that - or
commercial paint names, for the following shades of DEC paint:
pdp-15 'powder blue'
pdp-10 dark blue
pdp-12 green
The light, very slightly creamy, grey paint used for front panel frames,
RA8x disk drives, etc.
Have some restoration to do!
Thanks - please CC any replies to my email, list digest distribution seems
slow of late!
Mike
http://www.corestore.org
14 Nov
14 Nov
3:10 p.m.
Get someone to tour one of the museums (RCS/RI?) with a
digital camera and a test patch. Initially the test patch could
be just a piece of white paper, but it should be opaque. Put
the patch on the subject, photograph, and later read off the
RGB's, (re)white balancing if necessary. Multiple participants
with multiple machines machines would be useful to compensate
for the Sun-fade history of the paints.
pdp-15, pdp-10, pdp-12...
I have none of these
or I would help.
John A.
8:22 p.m.
On Mon, 15 Nov 2004, Mike Ross wrote:
Does anyone have codes - Pantone numbers, or something
like that - or
commercial paint names, for the following shades of DEC paint:
pdp-15 'powder blue'
pdp-10 dark blue
pdp-12 green
The light, very slightly creamy, grey paint used for front panel frames,
RA8x disk drives, etc.
Have some restoration to do!
Any local paint store or paint department in the local hardware store
should be able to do a computerized paint match if you bring in a sample.
I used Behr color swatches from the Home Depot to match the colors for the
PDP-1 replica I did and they came out *very* close.
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
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8:31 p.m.
Any local paint store or paint department in the local
hardware store
should be able to do a computerized paint match if you bring in a sample.
I used Behr color swatches from the Home Depot to match the colors for the
PDP-1 replica I did and they came out *very* close.
Actually Mike isn't the only one that would be interested in knowing the
Pantone colours for DEC HW. Though I'd also like to know the correct colour
for "China Red" as used in later model PDP-10's.
Zane
8:37 p.m.
On Sun, 2004-11-14 at 23:31 -0800, Zane H. Healy wrote:
Actually Mike isn't the only one that would be
interested in knowing the
Pantone colours for DEC HW. Though I'd also like to know the correct colour
for "China Red" as used in later model PDP-10's.
Zane
Hell, I'd love some info on the 18-bit blue that PDP-7 used. Wasn't it
the same as the PDP-1?
--
Tore S Bekkedal <toresbe(a)ifi.uio.no>
15 Nov
15 Nov
2:28 a.m.
On Sun, 2004-11-14 at 23:22 -0800, Vintage Computer Festival wrote:
Any local paint store or paint department in the local
hardware store
should be able to do a computerized paint match if you bring in a sample.
I used Behr color swatches from the Home Depot to match the colors for the
PDP-1 replica I did and they came out *very* close.
Agreed. The matches tend not to be perfect, even without taking sun fade
into account. For a computer where it'll be indoors anyway they're
probably acceptable though!
cheers
Jules
3:37 a.m.
The matches tend not to be perfect, even without
taking sun fade
into account. For a computer where it'll be indoors anyway they're
The idea with sun fade is that the color was permanantly
changed... different people who have machines at different
locations probably have had their machine colors change
based on history in the sun, and if you want that "Factory
fresh" color, it would be a process of finding who has
basically the most saturated paint job. Then again we
aint the Smithsonian here.
John A.
7:16 a.m.
If you take a sample to a store that sells automtive paint they'll match it up
exactly.* There are LOTS more automotive colors than home colors. After all, the auto
manufacturers come out with new colors very year. You don't paint your house a new
color every year do you? Once you find a color match how about reporting it here. Maybe
someone will collect all of the reports and make a cross reference.
*Well not just any store that sells auto paint. Discount Auto Parts and the like only
sell what comes in spray cans. Go to a store that sells auto paint to paint shops. They
custom mix everything.
Joe
At 01:28 PM 11/15/04 +0000, you wrote:
On Sun, 2004-11-14 at 23:22 -0800, Vintage Computer
Festival wrote:
Any local paint store or paint department in the
local hardware store
should be able to do a computerized paint match if you bring in a sample.
I used Behr color swatches from the Home Depot to match the colors for the
PDP-1 replica I did and they came out *very* close.
Agreed. The matches tend not to be perfect, even without taking sun fade
into account. For a computer where it'll be indoors anyway they're
probably acceptable though!
cheers
Jules
7:59 a.m.
On Mon, 15 Nov 2004, Joe R. wrote:
You don't paint your house a new color every year
do you?
You haven't met my wife.
*Well not just any store that sells auto paint.
Discount Auto Parts
and the like only sell what comes in spray cans. Go to a store that
sells auto paint to paint shops. They custom mix everything.
How much per pint/gallon? (Or metric buttload for the EU folks).
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
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8:01 a.m.
On Mon, 2004-11-15 at 10:59 -0800, Vintage Computer Festival wrote:
How much per pint/gallon? (Or metric buttload for the
EU folks).
It runs in at about 2.6 Metric Fortunes per Buttload, but on special
offerings and such you can get them for just over 1 Fortune. :)
--
Tore S Bekkedal <toresbe(a)ifi.uio.no>
9:39 a.m.
On Mon, 15 Nov 2004, Tore S Bekkedal wrote:
On Mon, 2004-11-15 at 10:59 -0800, Vintage Computer
Festival wrote:
Suddenly I hear the word "floatbg" in my head... ;)
I don't, because I can't figure out how that's supposed to be pronounced
:\
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]
You
don't paint your house a new color every year do you?
You haven't met my
wife.
9:55 a.m.
On Mon, 2004-11-15 at 12:39 -0800, Vintage Computer Festival wrote:
On Mon, 15 Nov 2004, Tore S Bekkedal wrote:
Floatbg is a unix toy that slowly, slowly floats the X desktop
background. It's pronounced floatbg.
Description: slowly modify the color of the X root window
Subtly changes the color of the root window over time, so slowly
that it won't be noticed. This is a good alternative to placing a
picture in the root window.
I think that it's so old-skool that it's actually on topic :)
--
Tore S Bekkedal <toresbe(a)ifi.uio.no>
On Mon, 2004-11-15 at 10:59 -0800, Vintage
Computer Festival wrote:
Suddenly I hear the word "floatbg" in my head... ;)
I don't, because I can't figure out how that's supposed to be pronounced
:\
You
don't paint your house a new color every year do you?
You haven't met my
wife.
8 a.m.
The thing that ticks me about Pantone, Behr, Sherman Williams or
whatever is that they're proprietary systems and RGB is the "Open
Source" solution, going back to basic principles and should be
communicable to the proprietary mixer systems, but not the reverse.
BTW I have a 2nd hand Pantone guide right here, it reads out to "three
parts pantone light red and 1/8 part ..." yadda.
John A.
9:07 a.m.
The thing that ticks me about Pantone, Behr, Sherman
Williams or
whatever is that they're proprietary systems and RGB is the "Open
Source" solution, going back to basic principles and should be
communicable to the proprietary mixer systems, but not the reverse.
RGB isn't enough - not everyone's visual system's response can be
modeled accurately by RGB. (Some people have colour receptors whose
response peaks are at nonstandard frequencies; a few people even have
more than three different colour receptors.)
The only really comprehensive way would be to give the full
frequency-vs-albedo curve.
/~\ The ASCII der Mouse
\ / Ribbon Campaign
X Against HTML mouse(a)rodents.montreal.qc.ca
/ \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B
4:56 p.m.
der Mouse wrote:
RGB isn't enough - not everyone's visual system's response can be
modeled accurately by RGB. (Some people have colour receptors whose
response peaks are at nonstandard frequencies; a few people even have
more than three different colour receptors.)
Just what kind of people have more than 3 color receptors.
Offhand I think there is a older system for color mesurment
and just forget what it was. Remember colors of light and
colors of pigment require two different systems of mesurememnt.
Play around with real raytracing and you will see how hard it
is to get any realistic looking colors.
11:56 p.m.
Ben Franchuk wrote:
der Mouse wrote:
Some people (all of them women) have four different colour receptors.
There are two different kinds of "Red" cone, chosen genetically. Yours
may be different from mine. We might well match two different Pantone
cards against, say, a piece of cloth, or a switch on the panel of a
large computer.
Now, the gene that codes for which type of red receptor you have is in
the X chromosome. One of the reasons why boys are many, many times more
likely to be colour-blind than girls is that girls have two X
chromosomes, so the "good copy" will be used. What happens then is a
bit more interesting - the retina of the girl's eye will have
colour-blind spots. You can find these by shining a very narrow
coloured beam into the eye, and moving it about. Some bits of the
retina won't let her see what colour the beam is, some will. It's
exactly the same way that a black-and-white cat and a ginger cat will
have tortoiseshell female kittens.
So, if one parent has one kind of red cone, and the other parent has the
other kind of red cone, then the resulting retina will be a patchwork of
both types of cone. Women who have tetrachromatic vision can tell the
difference between tiny gradations of colour, so small that most people
cannot see it.
Gordon JC Pearce.
RGB isn't enough - not everyone's visual system's response can be
modeled accurately by RGB. (Some people have colour receptors whose
response peaks are at nonstandard frequencies; a few people even have
more than three different colour receptors.)
Just what kind of people have more than 3 color receptors. 
10:08 a.m.
>>>> "John" == John Allain
<allain(a)panix.com> writes:
John> The thing that ticks me about Pantone, Behr, Sherman Williams
John> or whatever is that they're proprietary systems and RGB is the
John> "Open Source" solution, going back to basic principles and
John> should be communicable to the proprietary mixer systems, but
John> not the reverse.
John> BTW I have a 2nd hand Pantone guide right here, it reads out to
John> "three parts pantone light red and 1/8 part ..." yadda.
Pantone is a system for making up well-defined colors in a printing
process. RGB is not applicable there. CMYK is somewhat closer, but
it doesn't do the job either -- there are plenty of Pantone colors
that can't be created by process color (CMYK).
Pantone is proprietary, perhaps, in a sense. But it's an industry
standard known by everyone in the printing industry world wide. If
you want to tell a printer about a color, that's how you do it.
I suspect it predates RGB color and computer graphics, though I'm not
sure about that.
paul
10:26 a.m.
On Mon, 2004-11-15 at 13:16 -0500, Joe R. wrote:
If you take a sample to a store that sells
automtive paint they'll
match it up exactly.*
Been there, done that. The systems they use for colour matching aren't
that precise - not enough to do an exact job. I went to five or so
different paint specialists a while ago, and they all say the same
thing.
Yep, you can get close - and certainly close enough that you won't
notice any difference indoors, but it isn't an exact match. Place two
items together in good light where one's been sprayed with the matched
paint and you'll probably be able to tell.
I believe the innacuracy is in the mixing process rather than the
analysis phase; the larger quantity of paint you order the closer the
match gets. Plus I'm not sure what the situation is in the US, but over
here the specialists can legally only sell to licenced people (of course
the people you actually talk to tend to bend the rules a little)
cheers
Jules
7222
days inactive
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18 comments
11 participants
participants (11)
-
allain＠panix.com -
bfranchuk＠jetnet.ab.ca -
gordon＠gjcp.net -
healyzh＠aracnet.com -
julesrichardsonuk＠yahoo.co.uk -
mouse＠Rodents.Montreal.QC.CA -
mross666＠hotmail.com -
pkoning＠equallogic.com -
rigdonj＠cfl.rr.com -
toresbe＠ifi.uio.no -
vcf＠siconic.com