Dying Alumilite Clear

I am casting brake light lenses using Alumilite Water Clear, measuring 90 grams of both A and B using 30 drops of Alumilite Red dye. Mix is in Part A before degassing then degassing both before mixing the two parts. Then setting the timer for 5 minutes mixing parts A and B using a scale to add part B, mixing, degassing again before pouring. Pouring is over the defusing lines in the lens moving back and forth and dumping the remainder in the bottom half of the squish mold and placing in a compression pot at 60 psi for 2.5 hours. Parts always come out great. All Alumilite products are stored in a temperature controlled area and I place two three inch square cuts of plastic bag between the part B cap and the bottle. I have used Water Clear from the same two gallon bottle for over 18 months with no problems.