Frequent or possible causes when handling paints
During processing
Difficulty of spreadability
- The consistency of the paint material is too high and has to be thinned again by means of dilution.
- Addition of unsuitable, e.g. too volatile solvents
- Too warm substrate (too fast drying of the paint)
Poor wetting of the substrate
- Fat and wax residues or silicone-containing substrate (remove by grinding or cleaning with solvents)
- Moisture on the substrate
- Too greasy substrate (grind or wash off with ammonia water)
Insufficient coverage
- Too thin application of the ink material (ink too thin)
- Struck out too much
- Insufficient stirring of the paint material
- The colour of the substrate is so different that it cannot be covered with a single coat of paint
Struck out too much
- Paint that dries too quickly (e.g. thinner that is too volatile) for large-area coatings
- Addition of unsuitable, e.g. too volatile diluent
- Processing at too high temperatures
- Too thick or too thin application
Untidy looking surfaces
- Conspicuous dust on lying paint (unsuitable, dusty environment)
- Unclean substrate (grinding dust not removed)
- Dirty paint (stirred in skin)
- Mixture of incompatible paints or addition of incompatible thinners
- Dirty bristles or new brush
Poor drying out
- Too rich order, e.g. due to difficult spreadability
- Insufficiently dried primer coat
- Surface drying too quickly due to excessive heat or sunlight. Prevents healthy drying from bottom to top
- Addition of slowly evaporating solvent
After processing
Loss of gloss
- Exposure of fresh paint to moisture (fog, dew, rain)
- Highly absorbent substrate
- Too much thinner and poorly filling substrate
- Badly stirred paint
Poor adhesion
- Missing or unsuitable primer
- Dirt, dust, wax and grease layers on the substrate
- No pretreatment on old coating
Wrinkle
- Too thick application and poor drying
- Surface drying too fast
- Insufficient connection to the substrate due to layers of grease or wax
Bubble formation / silicone dots
- Damp underground
- Material containing silicone in the working area (transfer by rag or air)
- Spray gun insufficiently cleaned (use hammer finish paint) or condensation water from compressor
- Porous substrate (ascending air bubbles in fresh paint)
- Fog or dew in the fresh coat of paint
