ND Filters are designed to reduce the light output of your light source without changing the color temperature. ND filters are often used on windows to reduce the brightness and balance the contrast ratio of daylight to the indoor or shadowed area.
GamColor is deep dyed polyester – the color is linked molecularly into the polyester. There is a distinct advantage to this process over surface coated polyester. The deep dye process is more difficult to remove because it disturbs the molecular structure. Once the color is placed into the film it becomes difficult for color to evaporate or depart from the polyester base. In contrast, surface coated polyesters are more susceptible to fading when exposed to heat since the coating is merely placed on the surface and can readily evaporate.
Polyester melts at 480° F while polycarbonate-based gels melt at approximately 380° F. Polyester does not soften until it reaches 400° F, whereas polycarbonate softens at about 270° F.
Please note that the color filter samples shown on this web site are a suggestion of the color. You should always make your final selection with a GamColor swatchbook in hand.