how to make blue coloured kerosine to colour less? what cheical to use?
101358
I think the only pratical way ot do this will be to distill the kerosene.\n\nBut be aware that you are probably breaking the law by doing so. The colouration is added to make it comply with safety laws.
240721
food coloring or shoe polish
946614
a way I know COULD work is that you make a selection and only select what you want to keep colored... that's kinda very pointy work though, then you do "Invert Selection"  (Ctrl-I) and then set the saturatipon as low as posible to make what is selected (now everything exept what you want to keep colored) grey...
413258
It's no use trying to find that out. Those conditions are to be fully controlled to get "non-colored" products.\nAnd be careful with what you use in food products!!
840358
When you first add the bromothymol blue to your acidic solution, it will give a bright yellow color to the solution.\nWhen you titrate with NaOH, the endpoint will be a color change to Blue.
781918
1.  There are some additives used in cake mixxes that make a better product. I do not think that color should be added to things. Some people are allergic to the colors. (my husband and my dog) There are natural colors that can be used. Beet juice for instance for red.There are natural flavorings that can be used. \n2. Some additives are preservatives and they do make food last longer and prevent food poisoning. There has been research into ADD and ADHD being affected by food additives, particularly colors. \n3. Some people are allergic to MSG ised to enhance flavor. (me) it is the cause of "Chinese Restaurant" headache\n4. On the whole they are not potentially harmful, but I think we could use far fewer.We could stick to natural ones.
123743
Ketchup Stain Removal\nFrom Sarah Aguirre,\nStain Removal Step 1.\n\nRemove as much of the excess ketchup as possible from the fabric.\n\nStain Removal Step 2.\n\nRun cold water through the back of the stain as quickly as possible. This will force the stain back out through the fabric.\n\nStain Removal Step 3.\n\nRub a liquid detergent into the stained portion of the fabric. Work it in gently.\n\nStain Removal Step 4.\n\nIf the garment is white, or you have tested it for colorfastness, apply a mild bleaching agent like hydrogen peroxide or white vinegar with a sponge. You can also use lemon juice on white fabrics. Rinse well.\n\nStain Removal Step 5.\n\nRepeat with detergent followed by mild bleaching agent until the stain no longer appears.\n\nStain Removal Step 6.\n\nApply a stain remover stick, gel, or spray and allow it to sit for at least 5 minutes.\nStain Removal Step 7.\n\nLaunder with detergent. Before drying double check the stain.\n\nStain Removal Step 8.\n\nIf the stain remains, rub detergent into the stain and soak in warm water for 30 minutes. Rinse well.\n\nStain Removal Step 9.\n\nIf the stain remains, apply stain remover stick, gel, or spray and launder according to directions.
604242
so do you want the color of Potassium Hydrogen Sulfate (KHSO4), or Sodium Hydrogen Sulfate (NaHSO4)? I guess it wouldnt matter, they would both be colorless anyway. In crystalline form they would be white to clear crystals too.
1089541
it is blue when exposed to oxygen but otherwise colorless
332947
I've found the Munsell Book of Color the best reference for comparing colours:\nhttp://www.it.lut.fi/ip/research/color/database/munsell.html\nI own a book given as a reference below, but it is mostly for plant leaves and probably lacks the right colour chips for all shades of mango. But it is waaay easier to find than the Book of Color! (And actually USE.)
500976
You can use either phosphoric acid solution (35%) or tannic acid solution (20%). Phosphates give a grey/black. Tannate gives a BLUE/BLACK. If you are trying to "parkerise" the surface there are a number of commercial parkerizing solutions available.
9201
Well since you did ask this in the science forum I might as well try answering this in such a manner as akin to scientific method.\n\nStep 1:\nWrite down the 3 Primary colours (Red, Blue and Yellow)\nStep 2:\nWrite down the 3 secondary colours (Green, Purple and Orange) \nStep 3:\nNow write down 2 additional tertiary colours (Brown and Black) \nStep 4: \nPlay the survivor game and eliminate a colour each round.\nStep 5:\nNow that you only have one colour left go to a paint shop and get those strips which show the different hues of the said colour.\nStep 6:\nPlay the survivor game again and eliminate each strip until you are left with only one.\nStep 7:\nFind name of colour which corresponds to the colour strip.
782974
Potassium permanganate (KMnO4) stains fabrics, fingers, and paper a dark brown color. The coffee-colored stains often can't be scrubbed off, and they may persist until the outer layer of stained skin wears off (in a day or two). It's more than just a nuisance for students and laboratory workers. Municipal water supplies are sometimes overtreated with permanganate ion to kill microbes and parasites, and when that water is chlorinated, swimming pools and porcelain can be badly stained.\nPermanganate itself is a deep purple color (almost black). The brown stain develops when permanganate decomposes into crystalline manganese dioxide on the skin or fabric surface:\n\n4 MnO4-(aq) + 4 H+(aq) = 3 O2(g) + 2 H2O() + 4 MnO2(s)\n\nThe tiny crystals of MnO2 become trapped in the pores and complex surfaces of the skin. The crystals are insoluble, and washing with water will only dislodge a few loose crystals. If the stain is on a nonliving surface, try treating it with a weak hydrochloric acid solution. Hydrochloric acid can reduce the MnO2 to water-soluble Mn2+:\n\nMnO2(s) + 4 HCl(aq) = MnCl2(aq) + Cl2(aq) + 2 H2O()\n\nCuriously, permanganate's oxidizing power makes it very useful for removing stains. Permanganate oxidation breaks the molecules of large, highly colored substances into smaller pieces. The excess permanganate is then removed chemically or by quickly rinsing.\n\nFor example, book collectors remove stains from old paper by washing the paper with a weak solution of permanganate; a rinse of sulfurous acid is used to remove the permanganate before it locks into the paper fibers and turns it brown. The same trick can be used to remove indelible inks from concrete. Photographers use permanganate to bleach stains caused by certain developing chemicals.\n\nHope that helps!!!
595423
there r 2 kinds of gram-stain..positive n negative...use 2 kinds of reaction..the first is iodium n use alcohol as the cleaner..n the positive gram will keep the color of iodium so it will stay b purple...n use the second reaction which is safranin or methylene blue then the negative gram will be red or blue...
461513
I dont think you can. =^P It would be wierd if I was seeing blue and somebody else was seeing (my version of) red and saying it was blue... Mabye everybody has different color views. Never know.
442218
Crystal Violet \nIodine Solution  \nEthanol\nSafranin \nWater \n\nGram -ve = pink\nGram +ve = purple
422302
Methylene Blue is a homologue of Toluidine Blue O. This stain is used to visualize intracellular metachromatic granules. \n\nProcedure:\n\nSmears are fixed with heat and allowed to cool.\n\n\nStain with the methylene blue (homologue of toluidine blue O) solution two to seven minutes.\n\n\nWash slide and blot dry. \n \n\nResults: By this method, the intracellular metachromatic granules stain a ruby-red to black color; with the remainder of the cell staining a pale blue color. \n\n  \nhttp://www.life.umd.edu/classroom/bsci424/LabMaterialsMethods/MethyleneBlueStain.htm