Are the colorimeter. These devices used to cost a fortune for military paint
matching as the finish also makes the paint look a different colour, so the
faintest tendency toward rippling etc can look a different colour.
Brian

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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"tim..." wrote in message
...
Went into a store (I won't name it because it mighty not be the store's
fault, could be a generic problem with this product) with a sample of the
emulsion paint that I wanted, painted on to a piece of plasterboard (of
the same type that I expect to be painting onto).

now that I have opened the tin and painted the the walls (well a bit of)
the colour has dried out to be closer to that of the base colour of the
plaster board than the colour that I pained on.

I guess that the emulsion is translucent to the laser device that they use
to determined the colour mix and I got a result tainted by the colour of
the backing?

going back tomorrow with the same painted onto some gloss white paper.

bugger is I bought 10L of it

tim