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Model Forum / General / Models / December 2005PC 10 paint
I understand that pc 10 was the basic color of RAF aircraft in WWI? I just read a reference that PC 10 color varied greatly from lot to lot and could be a near dark green to a dark brown shade, with the brown tones tending be more common after April 1917 and eventually becoming the prevalent shade. This would tend to the same for US OD during WWII would it not? Was the change in shade perhaps more due to longer term exposure to the elements than a diversity in the paint formulation? PC 10 was used after the war also, wasn't it? If it did tend to be brown rather than green by the end of the war, as the need for the paint dwindled and the now limited supplier(s?) only had to supply smaller batches, did it go back to the green shade for post war RAF aircraft or was it actually a brown color? Or did the RAF just use old stocks of paint until they ran out, which would mean, I think that the brown color would be the most common, but perhaps in many different shades. > I understand that pc 10 was the basic color of RAF aircraft in WWI? > [quoted text clipped - 16 lines] > would mean, I think that the brown color would be the most common, but > perhaps in many different shades. I was too quick on the draw with the question re OD, I think it tended to be greener near the end of the war, starting out greener, then going browner, then back to a greener shade? I know that OD as delivered tended to be in various shades depending on supplier resulting in various shades of control surfaces or other sub supplied parts as to other parts of larger aircraft. This tended to be less contrasting on smaller aircraft, wasn't it? I really don't know, just guessing a bit here. PC10 wasn't really paint as we usually think of it. It was supplied as two main dry pigments, yellow ochre and lampblack, and some other ingredients. They were mixed, dry, by weight in a specific proportion and then added to the dope. Variations in colour resulted from variations in mixing of the dry pigments, the types of varnishes used and the length of time they were exposed to the weather. Fresh, glossy PC10 finishes are said to have been greener in appearance because of an optical effect called Green Shift. I don't know how this worked but it wore off as the gloss wore off. The finish then became browner in appearance. I remember reading that the original Olive Drab finish applied to American aircraft from 1917 till the 1920's was actually PC10 as used on the British aircraft supplied to the AEF. This suggests that it would have exhibited the same variations unless the dopes and varnishes used on American aircraft were somehow different from those used on British types. Gordon McLaughlin > I understand that pc 10 was the basic color of RAF aircraft in WWI? > [quoted text clipped - 16 lines] > would mean, I think that the brown color would be the most common, but > perhaps in many different shades. > I understand that pc 10 was the basic color of RAF aircraft in WWI? > [quoted text clipped - 16 lines] > would mean, I think that the brown color would be the most common, but > perhaps in many different shades. This is going to be a HUGE thread (if any WWI buffs can get past the horrible spamming going on here recently). Mix yellow and black paint. Once you have done this experiment, it will be awful hard to convince yourself that PC10 was brown. ;) >Mix yellow and black paint. Once you have done this experiment, it will >be awful hard to convince yourself that PC10 was brown. ;) Exept PC-10 had other colours in it as well..... Remove nospam to reply!! |
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