DEAR SIR,
I want import ultra-filtration and nano-filtration membranes for purification or desalination of reactive dyes for making water base inkjet inks.

Molecular weight of dyes I have to purify are as given below.

1- Reactive Blue 15 Molecular weight = 1347 g/mole
2- Reactive Yellow 95 Molecular weight = 938.3 g/mole
3- Reactive Orange 13 Molecular weight =762.04 g/mole
4- Reactive Blue 49 Molecular weight = 816.2 g/mole
5- Reactive black 5 Molecular weight =991.82g/mole
6- Reactive black 39 Molecular weight =1021.16
7- Reactive Red 218 Molecular weight=1347.13

Pl. Guide me which of your membrane Ultra filtration and nano filtration is my exact need. PL. Reference that one you already supply to

Which country for purification of reactive dye and is successful.

Mainly I have to remove Chloride Ion, Carbonate Ion, Sulphate Ion, Calcium Ion, Magnesium ion, Sodium ion, and heavy metals if any.

Pl. Send me your recommendation and I will send PO and open L/C. Any thing further you want to welcome.