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Blue or green paints bleach when used on machine tools?

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  • Blue or green paints bleach when used on machine tools?

    Anyone ever heard of this?

    I have some Medium Blue Nason single stage polyurethane that I was going to use for a repaint...but then I came across this:

    http://www.cimcool.com/newpaint.pdf

    They seem to specify blue and green in particular as fade prone, wont all colors fade or stain with time and fluid exposure? What's so special about blue and green?



    [This message has been edited by abn (edited 12-17-2003).]

  • #2
    The pigments used in paints (and other things) all have different chemical properties. Ford used black laquer for the Model T because it dried fast and didn't fade since it is pigmented with carbon black. Red pigment is the most susceptible to fading from UV exposure. Green and blue paints are often pigmented with copper compounds such as chlorinated Copper Phthalocyanine. This is a halogenated copper compound and is quite stable. However, greys are made with mixtures of titanium dioxide and carbon black. This combination is especially stable and non-reactive. Also, a color shift is much more noticable to the eye than a grey shift. I learned a lot about pigments working for Xerox.
    Free software for calculating bolt circles and similar: Click Here

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    • #3
      Interesting stuff about coloring paints. I had an archer's bow which had a green fiberglass layer within the laminations. That bow always had a problem with it's alignment, as did other bows with the green color. Other colored bows in the same line were fine. We had it nailed down to sunlight, indoors it was ok, outdoors it would tend to warp one way or the other. The manufacturer discontinued the green color.
      I seldom do anything within the scope of logical reason and calculated cost/benefit, etc- I'm following my passion-

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      • #4
        Darryl,

        Aside from black, green is the most efficient color to absorb heat.
        Free software for calculating bolt circles and similar: Click Here

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        • #5
          That explains why a 5$ green fiberglass bow I bought at a tag sale warped into a pretzel when I left it in the car in the sun light.

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          • #6
            A little off the thread of this topic but if anyone is interested in knowing how to set up their computer system to print color as well as possible I have a tutorial online here:

            http://vts.bc.ca/color.htm
            Free software for calculating bolt circles and similar: Click Here

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            • #7
              I once used a "Butyl" degreaser for cleaning down a lathe. It really brightened up the old Clausing Grey but nearly wiped out the red on gearbox chart, it turned it light pink. This stuff really works well on the grease and oil but plays havoc on certain color paints (and your hands if you don't wear rubber gloves).
              Frank

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              • #8
                Did I read that article correctly? IMRON paint for the lathe? Doesnt IMRON run a few hundered dollars a gallon? Man, I would hate to paint my lathe with it and then make hot chips to throw all over the glossy paint. rr
                Civil engineers build targets, Mechanical engineers build weapons.

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                • #9
                  As in beer consumption, paint is in a similar sense "rented" when applied to a machine tool. If your using your machine tools for what they were intended the paint will wear away in areas of chip flow.

                  Durable paint makes sense but preserving a like new appearance of a machine tool at the expense of productivity is contrary to its function.

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                  • #10
                    <font face="Verdana, Arial" size="2">Originally posted by rockrat:
                    Did I read that article correctly? IMRON paint for the lathe? Doesnt IMRON run a few hundered dollars a gallon?</font>
                    -When's the last time you priced automotive paint in general?

                    A typical gallon of basecoat/clearcoat Urethane in anything but white or black is $100 to $400 a gallon. That "chromagraphic" irridescent stuff might be $100 a pint. I had a car painted with some cheap enamel a few years back, and a gallon of that cost me $55 plus tax.

                    IMRON is old hat these days, no longer the pinnacle either chemcially/durability or in price.

                    Doc.
                    Doc's Machine. (Probably not what you expect.)

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                    • #11
                      Ops! The Ford Model T was NOT painted with black lacquer. Japan Black was used on some parts (Fenders, engine pan, dash panel, etc.) but the bodies were "squirted" with VARNISH. Also, not all Model T's were Black. From 1909 to about 1914, Red, White, Green, Blue and Grey were also available. "Lacquer" was not used until the Model A (1928).

                      You shouldn't have to wory about polyurethane fading unless you run your machines outside. One way to add UV protection is to clear-coat. Most of todays clear coats (automotive) have UV inhibitors added. The clear coat can be applied over the paint without further prep. You should clear coat within 4 hours.

                      Forgot to mention: Make sure you HAVE polyurethane. Nason's single-stage is usually Acrylic Enamel Not urethane. The urethanes REQUIRE a clear coat. The AE's do not but should be used with a hardner.


                      [This message has been edited by CCWKen (edited 12-20-2003).]

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                      • #12
                        Doc
                        DuPonts Chrome Allusions lenticular paint is $500/pint (cheap!)

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                        • #13
                          Ken,

                          You are undoughtedly right. However the main point is that it is pigmented with carbon black, just about the most durable pigment there is since it is an element, not a compound.
                          Free software for calculating bolt circles and similar: Click Here

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                          • #14
                            Yikes, I painted the '67 Mustang in 1990. I thought that the color for it was about $50-$75. PPG was the brand, I think. I would have to go through the file to see. Well, I guess that is the drawback to getting old, sticker shock. rr
                            Civil engineers build targets, Mechanical engineers build weapons.

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                            • #15
                              Seems like just yesterday, but it's been a year. Had the '69 Mustang painted last December with PPG Deltron basecoat clear coat. Materials were almost $600...

                              I was originally going to go cheap with a Nason single stage...but the situation changed and I was able to go with better materials. So now I've got the Nason left over and I thought I'd use it on my mill...

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