Turner, if you go back into the store section where the colorants are ordered, click on colorant and scroll down to where the basic recipes are found you'll see that red has no difference between the bait shot with 5 drops to four ounces and 10 drops to four ounces. When I consider a color, I always study that area to get a good idea of how much colorant [or in red's case how little] it will make to make the finished color opaque or with very little transparency. The X2 red shown in the colorant picture using 5 drops is pretty dense so I'd maybe start a recipe using four ounces at 2 drops. You can always add more colorant to opaque it.
Something to think about is what you can do with plastic. Red is a strong color and by keeping it a bit thinner than you think it should be you can add glitters to help deepen the color and you can add a red or rose hi lite to the plastic to give it some real fire from inside. I'd stay away from pearl unless you want an opaque bait with very little glitter showing. The hi lite used sparingly will give red a real nice bounce to the light moving thru it and will help the glitter by reflecting extra light inside the plastic if it is kept transparent enough....in thin red the glitter and hi lites deepen the color instead of the colorant. In sunlight the plastic using the hi lite and glitter will be super-charged almost. I'll assume that your plastic making is in its infancy and if so these things will come with time and experimentation. Don't give up on red, challenge it.
