Fixer f after mixing use within 24 hours. While fixer n after mixing use the paste unlimited time.
On behalf of Matsui we would like to confirm this quote to be true and accurate for the mentioned products.
I would also like to add that the Fixer F allows for a lower curing temperature that Fixer N. Fixer F allows for the ink to dry and set when it reaches 250-260 degrees F where as in Fixer N it will dry and set at 280-290 depending on the type of dryer and belt speed used. Please note these temperatures are inside the dryer and not on the digital displays. Please use the correct heat measuring tools to adjust accordingly. Just like any other ink, please always test to ensure proper wash fastness and adhesion. Without fixers we are currently recommending 320 degrees F for 2-3 minute belt speed with our 301 Eco Series.
For discharge ink we do recommend, but does not have the same effects and only drops the curing time slightly.