error patterns

Cause analysis for drain off marks in anodising

A common problem in anodising operations: The goods have been chemically pretreated and when ...

Iridescent colouring after anodising?

Occasionally, it arouses astonishment when, after anodising the products, profiles unexpectedly appear that show ...

Extraction of etching mists – How the ventilation of room air can be problematic

Small, white and unwipeable spots, visible on anodised and electrolytically coloured goods (e.g. C35 ...

Screen- and fried egg effect on electrolytically coloured aluminium

In classical, electrolytic colouring of aluminium surfaces with tin salts, uniform colourings from bronze ...

Small cause – big effect : Mistakes when cleaning in anodising operations

Small cause - big effect : Mistakes when cleaning in anodising operations Small cause ...

Too much colour due to tin on the surface the problem of over-dyeing

On anodised, electrolytically black-coloured and hot-sealed aluminum we see deposits - what could that ...