ashish
Forum Replies Created
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First of all, better not to use any oils in surfactant based formula b’coz it decreases its foaming power and if you would like to use oils in clear base, you should use solubilizers like polysorbate-20, caprylyl glucoside, heptyl glucoside and PEG-40 hydrogenated castor oil etc. Use oils in lower conc. Water soluble esters are available like PEG-7 glyceryl cocoate which would give you emollient effect if desired.
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Its a Solid-Solid mixing, but generally bleach is highly irritant and harmful to inhale. I faced some of the dangerous incident while mixing in lab becoz of quick formation of peroxide. U can use Zip lock plastic bags for mixing along with safety gloves and mask. If possible, better to carry out under supervision of experienced chemist.
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It forms lamellar liquid crystalline network which increases water retention function of the product. Its better to use additional emulsifier depending on oil loading.
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Its a tertiary butylhydroquinone phenolic antioxidant.
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Basic difference is the carbons present in each. Decyl is widely used than any other and it is most preferable & safe to use. Decyl is also has better cleansing and foaming power than others. It is easy to use also because of flow able properties than others. Caprylyl is not mentioned here but it acts as a solubilizer as well as mild surfactant. All glucosides manufactured from coconut fatty acid and glucose due which suppliers are giving natural claim and ecocert.
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Sorbitol is in higher conc. here, it is a biggest suspect, please check colour of sorbitol and try to indent colourless sorbitol from suppliers. Also check possibilities with St.acid also.
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To start up formulation, please refer ulprospector.com
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I also faced this problem, It may be due to 2-3 ingredients like Stearic acid, Perfume, Vit. E, orbitol & Xanthan gum also.
1. Stearic acid is available in off white to slight yellow colour which may change colour at accelerated temp. because it is prepared from vegetable fat which tend to change colour.2. Perfume is formulated with many of the ingredients which tend to change colour from off white to yellow at accelerated temp.3. Vit.E is also available in yellow colour which may be threat here.4. Sorbitol tends to change from off white to dark brown at accelerated temp. or long storage because it is prepared from glucose or dextrose which may change colour of it.5. Xanthan is also available in off white to slight yellow colour.You can try following solutions :1. Use suitable anti-oxidant other than Vit. E like Tinoguard range from BASF.2. Try other glycol or triglycerides instead of sorbitol.3. Check colour of your perfume used. -
Thanks Bill, i am already using anionic surfactants but not getting satisfactory results. I know non ionic surfactants are more preferable for solubility of dyes but problem is that a very few of this kind are available in powder form & moreover they are costlier.
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Carbopol 941 is a traditional one, Ultrez 20 is a advance version which is more easy to disperse as faster as that of 941. But, it is costlier. Other suppliers would be there to provide carbomer for your purpose which would be cheap. But, if you use pemulen TR1 which is a polymeric emulsifier carbomer at lower dosage (0.1-0.3%) can work excellent without using any other emulsifier.
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The purpose of use of sodium hydroxide (Lye) here is only for adjustment of pH. It is a safe ingredient for pH adjustment (from acidic to neutral only).
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Thanks for suggestions, Let me explain first that finished product is in powder form which is to be mixed with water by consumer & apply on hairs (Powder hair colour). pH of solution of powder is acidic & desired pH to be on neutral to slightly basic side so that need a buffer in powder form to achieve neutral pH.
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Sodium hydroxide is available in two forms flakes & pallets & my product is in powder form & moreover NaOH is hygroscopic which is a disaster for such a powder hair colour.
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Yes it is. You would get thickness from fatty alcohols or else try natural gum also but they tend to form off white cream rather than milky white. Modified gums are available in market which may solve this. Polymeric emulsion stabilizers are also available but in dispersion form. (e.g. Sepiplus 400, Viscoptima, simulgel INS 100 etc.)
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I am using Brookfield one which performed well for me.
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In India, they are having different formula. They are not adding Sodium tallowate & claiming Bathing bar means contains mild surfactants.
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Congratulations Sir!!!!!!
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Thanks to all, product is in powder form & pH is towards acidic side (3-4) & to be raised towards neutral for which i need buffer. moreover its a natural based product (Natural hair dye)
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pH of finished product would be towards neutral side & after addition of all ingredients, pH was on acidic side so that how to increase towards neutral by using suitable natural buffer.
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I tried this ingredients : Indigo, Henna & acacia catechu, coffee, embilica officinalis etc.
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I do agree with Mike, you can try hexandiol as a solvent.
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One of the good solubilizer like Heptyl glucoside can be used, moreover it doesn’t form foam.
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I do agree with Bill but in addition to this It may contain Sodium picramate or a natural dyes like Indigo & Henna combination. pH of this kind of hair colors is towards acidic side while in oxidative dyes pH is alkaline when mixed with H2O2.
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It is due to highly alkaline pH. Aqua SF 1 would work great at near to neutral pH & would impart suspending power but generally, soap based preparations are highly alkaline. You can try natural gum based thickener or acrylate copolymer or crosspolymer which would be stable at high pH. I think carbopol SC 200 may work.