Phenolic yellowing issues We have been facing yellowing on the fabrics kept at stores,all the test results were passing like PH,Phenolic yellowing,Formaldehyde,Light and BGF but we couldn;t come to an solution . Hence we have finally kept the fabric exposed in sunlight for a day and found that it has totally became yellow in the exposed area. So please advise whether the fabric stored can be wrapped with a opaque cover and also in the dark room to avoid the issue. 1 month ago * Close viewer * Like * Comment * Follow * Flag * Flag as Promotion * Flag as Job * Flag as Inappropriate * More Reply Privately Suresh Kumar, Marco Premoli like this You, Suresh Kumar, Marco Premoli like this 21 comments • Jump to most recent comments SureshUnfollow Follow Suresh Suresh Kumar • Your fabric is definately containing some chemicals and its Ph is not neutra. ; The test done by you is not correct. You may send your fabric sample to our lab for correct test and evaluation. We can definately suggest a solution. Dyetech Consultants ( Testing Lab Division} 98 Ind Area A Ludhiana. PH 08528806039, India 1 month ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion ShaileshUnfollow Follow Shailesh Shailesh Shah • what kind of fabric, Is it 100% cotton or other blend? 1 month ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 DanUnfollow Follow Dan Dan Koshak '50 • Check your softeners used 1 month ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 JayakumarUnfollow Follow Jayakumar Jayakumar Gopalakrishnan • The possibilitiess are 2. 1. The store illuminant is damaging the OBA , Fluorescent illuminants contain UV and can be quite damaging, especially the new CFL lamps. 2.
The fabric was not neutralized properly, the ISO pH test does not show up bad neutralization as well as the AATCC tests does. We have done several correlations and have sufficient data to prove this. Most mills will check the last bath water and fabric surface for pH , they dont use the correct method to calculate the acid/buffer required to neutralize the fabric ( PKa PKb) , and hence may have unloaded at 6 or 6. 5, but the Alkali in the core would first come out when squeezed in the Padder and will form salts with the cationic softener, which can be checked by scoring the fabric and checking for white lines.
Further on storage this alkali damages the OBA and causes yellowing. If the yellow is lemon then it is phenolic if it is a redder yellow or what is called Golden than it is alkaline. One must also factor for the volatility of Acetic aci if that was used for neutralizing. 1 month ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 1 AbhishekUnfollow Follow Abhishek Abhishek Jadhav • 1) Dear Ganesh I will just ask you to check core pH of your fabric after Application of OBA. for Core pH just boiled a piece of fabric at 98 C for 30 min in distilled water.
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Allow the solution to cool. Check the pH with the calibrated pH meter. 2) Now if you find your core pH to be highly acidic , I will suggest you to used a Sera Con M-TC from DyStar during your neutralization stage , which is a buffer. Thus even if the pH is not neutralized completely M-TC will not allow the alkaline pH of fabric to change beyond 6-6. 5. 3) Even after then if you faced phenolic yellowing problem, there is anti yellowing agent namely sera protect N-APY from Dystar. Just pad the fabric and your yellowing problem would be solved.
In case of any further support kindly contact me " jadhav. abhishek@dystar. com" 1 month ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 JayakumarUnfollow Follow Jayakumar Jayakumar Gopalakrishnan • I disagree with the boil at 98 Deg for 30 mins statement, unless you are pressure cooking it where the boiling point of water will be lower . At 1 Atm 100 Deg is the boiling point for water . 1. mins is too long and will case several changes that will give erroneous results. 10 mins is sufficient. Please see AATCC TM 81 for correct procedure.
My silence on the use of some special chemicals mentioned does not amount to my accepting these I have no knowledge on the use of these chemicals to make a comment. 1 month ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 SureshUnfollow Follow Suresh Suresh Kumar • Dear Jaaya Kumar I agree with you. In normal conditions, 90 Degree c and 10 Mts is o. k. But if we want 60 degree colour fastness to washing and zero shrinkage, in addition to Ph Neutral,then 30 Mts recommended by me. Regards. 1 month ago • Unlike • Like • Reply privately * • Flag as inappropriate * • Flag as promotion 0 KATHIRVELMURUGANUnfollow Follow KATHIRVELMURUGAN KATHIRVELMURUGAN RAMAKRISHNAN • Drop me your requirements. We have solutions for it and we have done it at numerous customer locations. Mail me at kathir@harrisandmenuk. com 19 days ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 sUnfollow Follow s s Madiwale • Jaya kumar is absolutely right 18 days ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 AminUnfollow Follow Amin
Amin Khoja • The theory of phenolic yellowing is as mentioned below :- Oxides of nitrogen are generated in warehouses/households from direct heating systems or from automobile emissions in the urban environment. Neither the oxides of nitrogen nor the phenolic compounds by themselves cause yellowing, but when united, form the yellowing products. The Butylated Hydroxyl Toluene OR the phenolic derivatives of lignin from the packing materials migrate to the surface and get transferred to the textile material, which in turn, when exposed to the oxides of nitrogen in the ambient atmosphere, cause yellowing.
Practically, Phenolic yellowing can be prevented by the following methods:  Avoidance of phenolic antioxidants and stabilizers in the packaging materials or in the synthetic polymer fibres used in the blends  keep the finished textiles at a slightly acidic pH (neutralization with specialty acids). Selection of Core-neutralising agent is important as, it should not contain mineral acid content.  Better to Avoid exposure to oxides of nitrogen pollution by different practices of storages condition 17 days ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion AminUnfollow Follow Amin Amin Khoja • Dear Mr. Jayakumar, This is in ref. to your comment related to boiling point of water i. e. when you pressure cook it than boiling point of water is lower. When we pressure cook the water the boiling point of water will go up or down? as per my information read from book of textile printing by L. W. C. Miles, 5 psi pressure on water will make boiling point of water around 108*C, 10 psi pressure on water will make boiling point of water around 115*C and so on. i. e. saturated steam will be generated at concerned pressure due to hick of boiling point. ecause, definition of saturated steam says that the steam which is generated at boiling point is to be known as saturated steam. Kindly correct me if, i am wrong. 17 days ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 ARUN KUMARUnfollow Follow ARUN KUMAR ARUN KUMAR WALIA • Kindly do let me know the following things so that I can let you know the cuases of yellowing :- 1. The fabric of which you are talking is made from which yarn. 2. Where in the process you are using Phenol. 3. Is yellowing occuring during processing or after complete processing. . If after complete processing then after much period. 5. What are the atmospheric conditions viz. Temp. , RH etc. under which yellowing is occuring. You just let me know these then I hope we will be in a position to resolve the issue , Arun Kumar walia 17 days ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 ZahidUnfollow Follow Zahid Zahid Akhter • Dear I have a OBA which cover all such problem if any body need please call 00923004200236 Zahid 16 days ago • Unlike • Like * • Reply privately * • Flag as inappropriate • Flag as promotion 0 DaveUnfollow Follow Dave Dave Ducker • Sorry for joining this discussion late, it is of interest that I see so many "wonder" products availble to prevent this from happening, but unless messages have been flying back and forth directly there is no information with regards to what fabric this is 100% cotton? what colour and or colours are affected? what is the fabric dyed with? reactives, vats, directs? others? when testing was the fabric exposed to the sunlight whilst still in the packaging or removed from the packaging? omplete chemical exposure of the fabric, process and finishing conditions and recipes? core pH's? if using acetic acid think about using citric, chemical make up of the packaging? there are many different possibilities where it is coming from. If a logical step by step approach is adopted you will find the answer. If you require more info feel free to contact me direct. Regards, 16 days ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 1 ShaileshUnfollow Follow Shailesh Shailesh Shah • Dave is exactly right without knowing chemical system, Machine, procedures , packing etc.
There was discussion about phenolic test and I mention that Need to evaluate each and every step and then find solution this is very common problem and solve easily. I have done lots of fabric whit fabric for 100% polyester to 100% cotton and also blend Nylon/cotton etc for several customer like Nike,Adidas,Tommy, columbia sports etc. 16 days ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 SueUnfollow Follow Sue Sue Bolton • is the fabic treated with OBA? it is known that the OBA degrades to yellow on exposure to light perhaps at ISO 105 B02 standard 1, then on further exposure this yellowing fades. ry assessing for light and examin at 30 min intervals 15 days ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 PalanisamyUnfollow Follow Palanisamy Palanisamy Krishnan • Dear Ganesh pls send us for testing.... 14 days ago • Unlike • Like * • Reply privately * • Flag as inappropriate * • Flag as promotion 0 PoongodirajanUnfollow Follow Poongodirajan Poongodirajan Ramasamy • dear ganesh, use the BHT(Butyl Hydroxyl Toulene) free polybags to store the products to avoid such issues 11 days ago • Unlike • Like * • Reply privately • Flag as inappropriate * • Flag as promotion 1 ShahidUnfollow Follow Shahid Shahid Iqbal • In addition to the comments regarding bags and pH, please check the softener as well. Use only silicon softeners. Follow the following steps. 1. Follow the full bleaching process (peroxide bleaching with OBA). Maintain the whiteness degree 20 more then your requirement. 2. Use silicon softener only in the finishing process... Silicon softeners will lower down your whiteness but since you already have a higher degree of whiteness this would be no problem at all.
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