Warning: Color matching is extremely difficult and requires a good eye for color and a certain amount of knowledge and thought – READ THIS AND YOU SHOULD MORE BE AQUIPT.
A Short Story…
David Benoy, the creator of Blue Gee and the author of our Blue Gee Book – Glassfibre and Epoxy Book – learnt a valuable lesson when matching a grey gelcoat. A number of greys were mixed to provide a very close match, however, not close enough. After a long hard stare at the color to be matched, it was sensed rather than seen that there was a red in it… A red? Believe it. A wiped match head of red pigment was stirred into about ¼ liter of a nearly perfect match grey gelcoat. When looking at the gelcoat it was almost impossible to see any difference but once applied to the job, wow, it was a match.
Moral of The Story?
Very small apparent changes may be necessary to achieve the best color match. A grey or cream may contain a red, blue or green. It is unlikely to be a pure mix of “black and white”
We have created a little table to provide some indication of color mixing effects.
|Main Colours at 3 Parts||Blue Gee’s Colour mixing guide – More info in our Book.|
|Add these colours at 1 part|
|Single Red 3756||Tangerine 3957||Golden Yellow 3754||Grass Green 11038||Anchusa Blue 5978||Violet 14319|
|Single Red 3756||Red||Bright Red||Light Bright Red||Reddish Brown||Dark Purple||Blood Red|
|Tangerine 3957||Deep Orange||Orange||Bright Orange||French Mustard||Olive Green||Deep Orange Buff|
|Golden Yellow 3754||Dark Reddish Orange||Medium Dark Yellow||Yellow||Lime Green||Medium Green||English Mustard|
|Grass Green 11038||Medium Chocolate Brown||Light Olive Green||Medium Green||Green||Dark Green||Grass Green|
|Anchusa Blue 5978||Medium Dark Blue||Dark Grass Green||Medium Dark Green||Turquoise||Blue||Bright Blue|
|Violet 14319||Maroon||Medium Reddish Brown||Milk Chocolate||Dark Purple||Blue Violet||Violet|
All Colors Stocked by Blue Gee – Click here for more Information
When Mixing any pigment to the clear gelcoat, always remember to
- decant the gelcoat, then;
- mix the pigment into the gelcoat.
Mixing gelcoat into a container pre-loaded with pigment will make mixing difficult due to the pigment tendency to adhere to the container wall. Always mix pigment and gelcoat before adding catalyst MEKP to the gelcoat.
Pigment may be used with polyester lay-up resin, although it is not recommended. If lay-up resin is pigmented and used for laminating it is very difficult to check that all air is excluded when consolidating.
Epoxy resin systems may be pigmented. Although our basic range – click here for Color Chart – of pigments are designed for use with polyester gelcoat systems. However, it is known that the polyester pigments may be suitable for coloring epoxy systems – subject to test, of course.
We have tested many pigments in Blue Gee’s Super Epoxy and found them satisfactory.
Note: Pigments are cosmetic and provide some protections against ultra violet (UV) light. Any pigment will inevitably slightly degrade the structural properties of any resin system.
Generally, add pigments in at 5% no more than 10%. Densities of pigments vary widely and are available as pastes, powders and liquids.