Color Shade changing measurement unit.

                      আজ আমি সেড এর চেন্জ সম্পর্কে কিছু কথা লিখবো।

বিভিন্ন টেকনিশিয়ান রা বলে, সেড ১৮-২০/১৯-২০ আছে, কিন্তু টেক্সটাইলের ভাষায় এইটা কি আসলে ঠিক?

           কালার সেড চেন্জ/স্টেইন তো গ্রেস্কেল দিয়ে মাপা হয়, আর সেখানে সর্বোচ্চ ও সর্বোনিম্ন রিডিং হল- ১-৫, তো ১৮/১৯-২০ কেমনে হয়।

 See picture:- 

Most of the wash/dyeing technician says the color difference to the standard is like- 18-20/19-20, to measure the color change of the outcome verses to the standard. But where color changing is actually measured using gray scale where no 19-20/18-20 remaining there. there is only remaining 4-5/ 5, or like 4 / 3-4 ... etc.  

There are two different type of gray scales in the market, one is  Color changing , another one is  Color staining.

Standards: -  AATCC standard and ISO/SDC-UK standard. 

Most of the major larger buyer recommends : AATCC standard gray scale for there test related work. 

Anyway, we should understand which one is correct and which one we should use to say the color stage unit. 

Once I have also found some of the wash technician and lab technician wrote to me via email that the color fastness to Rubbing is : 2.3 of a garment. I wondered!! haha, its funny, how could they write it to me... they are from a buying house and they should know the standards. it should be 2-3. (viewers, please check the gray scale above) there is no 2.3!!

Thanks for reading.

Written By,

K M Zahidur Rahman

Executive- R&D Section
Hameem Group.

Email:- kmzahid.samrat@gmail.com