What grades does melamine tableware have?
Melamine tableware is usually divided into three grades: A1, A3 and A5: A1: also known as urea-formaldehyde resin, cannot be used for tableware because its chemical stability is relatively poor…
Melamine tableware is usually divided into three grades: A1, A3 and A5: A1: also known as urea-formaldehyde resin, cannot be used for tableware because its chemical stability is relatively poor…