Dear Emmy san, VY san
As I informed before, TMMA are requested to measure APHA (UV method, APHA < 1.5 ) everyday
to control MMA quality.
Could you check daily result? ( before and after )
And procedure (DEA conc. management) is effective or not.
Yesterday Mr. Miyaki (MRC Director) said MMA quality (yellowish) of TMMA#1 and #2 is worse than HMC/DMMA in the past.
So he want confirm whether MMA of TMMA quality has been improved or not.
For your ref.
Quality (yellowish) : Otake > HMC > DMMA >> TMMA
Some customer rejected TMMA’s MMA because of color…
Best regards,
Otsuka