Knuchel Farben
Parent company with development, production and sales in CH-Wiedlisbach.
Subsidiary specialized in high quality painting and coating systems for industry, steel and hydraulic engineering as well as in many special fields.
Knuchel Farben LTD well-known brand for building protection products. Serves as a secondary brand, where an independent appearance should be possible.

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
  • 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