B2B Marker Pen Sourcing: What Permanent Marker Ink Chemistry Reveals About Supplier Quality
When a customer complains that a permanent marker left a pale, streaky line — or worse, that the “permanent” ink washed off after one rain shower — the real problem usually isn’t the individual marker they bought. It’s a chain of decisions made months earlier, at the sourcing stage, about solvent grades, resin chemistry, pigment […]











