Water and oil repellents for mineral surfaces and paper

• Identify substrate composition, porosity, moisture condition and existing surface treatments before choosing the carrier.
• Check ionic compatibility when combining an aqueous product with binders, auxiliaries or another treatment bath.
• Use representative light and dark substrates to inspect color, gloss, residue and uneven absorption after drying.
• Compare water uptake and oil-stain response with an untreated control, then repeat after the relevant cleaning or exposure cycle.
• Define destination-market and final-use composition requirements before approval, especially where treated paper has a regulated end use.

VN-FL-1007 provides a starting target of 2–5% active content in a compatible solvent, with butyl acetate identified as an option. This is an active-content target, not necessarily 2–5% of the supplied product. The reference application is one or two coats on a clean, dry substrate with at least 24 h drying. Confirm supplied activity and solvent compatibility before preparing a trial.

VN-FL-1008 is diluted with water, with the ratio determined by substrate trials; the reference is one or two coats and 24 h drying. VN-FL-1009 references one part product with 5–10 parts deionized or softened water, one or two coats and 48 h drying. Confirm whether parts are by mass or volume. These procedures are separate starting references, not a shared recipe for all four products.

Prepare adjacent treated and untreated areas from the same substrate batch. Record applied mass, coat count, dilution, drying conditions and appearance. For porous mineral surfaces, compare uptake as well as the ease of removing a representative stain. For paper, include bath stability with the chosen starch or PVA and the finished sheet properties required by the converting process.

If a treatment leaves haze or uneven color, investigate surface cleanliness, moisture, applied amount and uneven penetration before adding more product. If an aqueous blend flocculates, review water quality, ionic compatibility and mixing sequence. Establish the drying endpoint before comparing repellency: testing an incompletely dried surface can confuse carrier effects with final treatment performance.