Is somthing that is whole colorless inside?...until you cut it in half?
140410
Not sure what you mean: a transparent substance that, when cut/sliced/whatever, will display coloration?\n\nDue to a chemical reaction with the atmosphere? Try a gelatinous material with a fugitive acid and phenolphtalein. As the acid evaporates, the pH will rise beyond the equilibrium of phenolphtalein. (Or some other indicator changing from colorless to colored, closer to neutral.)\n\n\nSometimes coloration can result from surface structure rather than dyes: the brilliant blue butterfly wings of some South-American species result from nano-structures eliminating all non-blue light. Assuming that your substance  is connected by a liquid of similar refractory index, the surface effect will only occur once the surface is hurt and the liquid is allowed to dry away.
646111
You can turn it black with an iodine solution, then turn it back with sodium thiosulphate solution. Neat trick.
1113770
If it were possible to extract the heat, it would self-extinguish and cease to be a flame. You can have an invisible flame with no colour, if I remember rightly, burning pure alcohol produces this.
148513
Why would you want to make half a recipe?\nDo you mean half of the amount stipulated in the recipe?
175487
just funky metal\ntry painting the inside with clear nail polish
1089541
it is blue when exposed to oxygen but otherwise colorless
420293
What do you need corrected?   Is it bleached out?  If it is it needs a red filler put in and then colour it over with your desired colour.  It should even out.  If you have colour build up on the ends use a cocktail shampoo to rinse it out.  It 1 oz peroxide and 1 ox bleach and shampoos mixed in.  Only put it on for a short time like one minute and then rinse it out.  Then do your desired colour or cut it all off because it'll feel like straw.
956407
No.\n\nI saw the film, and there was no portion where it split into red/blue colour splitting. Since that is the only way to project 3D without dual cinema projectors and polarizing filters and special glasses, the answer is clearly no.
61841
Have you tried bleach?\n\nI found a message board post where they talk about using a bleach pen along with a quick rinse, which seemed to be successful.\n\n(I would think you could use bleach for colors if you need in place of normal bleach).
398440
Cut it with pseudoephedrine? ;)\n\nWhat are you asking?
446070
It seems you would make a strong solution of water and food coloring. Dip the macaroni into it.  Let it set for a moment or two, take it out, and let the macaroni dry well.\n\nBut, I'm guessing.\n\n[Edit]  Okay, here's the scoop.  I just tried it.  I made a very strong solution of (red) food coloring and (cold) water.  I put a piece of pasta into it and it quickly started to change color.  However, to get it a deeper, reddish-pink, I left it in at least two minutes.  The pasta was still hard (not softened by the water) when I brought it out.  It's drying now - I expect it will do okay!\n\nAnother way to color pasta is to dilute acrylic paint in water and use it the same way you would food coloring.\n\n(Or) if you only have a little macaroni to dye, you can paint-brush the color on (acrylic paint or food coloring straighter-from-the-bottle for richer color.\n\nHave fun!
670951
Unevenly reflected, I guess.\n\nIf it is absorbed, it would be completely black. If it was evenly reflected, it would be completely white. If it was trasmitted, it would be clear like glass. Uneven reflections let you see colours and texture.
230583
usually a stain or paint.\nHehehe, just kidding.\nI think it depends on the fluids inside the organ (ie. melanin, bile, urea, amount of blood flow to the organ, etc)\nAre you thinking of one particularily?
193833
if the paper is use white out
4788
Best method if practical is to freeze it.\nIf not sealed within a steralized container.
731318
Yes, it is a complex mixture of solvents/thinners, dyes, resins (depending on what type of coating you desire (epoxy resin), raw materials  (once again depending on the coating application).\n\nA simple paint recipe that can used in a smaller laboratory set-up is:\n\nMaterials Needed:\n2 cups flour \n2 teaspoons salt \n2 1/2 cups cold water \n2 cups boiling water \nFood Coloring \n\nInstructions:\nMix the 2 cups of flour with the 2 teaspoons of salt. Add the 2 1/2 cups of cold water; stir until smooth. Gradually add this mixture to the 2 cups of boiling water. Boil until the mixture becomes smooth and thick. Add the food coloring until you get the desired color.
687665
If it hits the floor its got crap on it. the longer there the more crap. I will occasionally use the 5 second rule, but still do a visual, since I'm not very fond of hair, feces, or other "dirts". There are a lot of stuff that you can't see. If you're not going to eat it right away throw it away. Bacteria grows pretty fast at room temperature.