SHRINKAGE / EDGE MAPPING
Description of problem:
Shrinkage/edge mapping occurs when 2 adjacent substrates
react differently to the solvents present in the topcoat or when
the roughness between the 2 adjacent substrates is different.
– Area is not isolated or isolated with an unsuitable filler.
– Filler is incorrectly applied.
– Wrong mixing ratio, too thin, or sanded too much to where substrate is showing.
– Insufficient drying or curing of substrate.
– Excessive film thickness.
– Sanding paper too coarse.
– Apply solvent test to identify soft substrates.
– Avoid applying thick coats of filler with little flash off time so that solvent is not trapped
within the film.
– Avoid sanding though to substrate and sanding too coarsely.
– Apply putty only to bare metal.
– Apply proper isolating primer and follow recommendations.
– Ensure preparatory materials dry properly.
– Dry topcoat thoroughly.
– Sand damaged area, isolate and repaint.
– When in doubt, remove all the way to the bare metal. Apply wash primer and respray.
- TEMATY SZKOLEŃ
- Drying is too slow
- BULLES SOUFFLURES
- Stripping / Banding
- Fish eyes
- Spider’s web
- ATMOSPHERIC POLLUTION
- CRACKING OR RIPPLING
- Loss of gloss
- Low gloss
- ADHESION PROBLEMS OF THE CLEAR COAT
- Orange peel
- Pin holing
- Poor adhesion
- SHRINKAGE / EDGE MAPPING
- Poor opacity
- Color offshade
- SOLVENT POPPING
- Polish marks
- Sanding marks