Step 1: Appear­ance Con­trol after E-coat
Same E-coat sys­tem was applied on rough and smooth steel. The influ­ence of rougher steel can be seen in increased Wb and Wc-val­ues.

Orange Peel and DOI mea­sure­ment
on high to semi gloss sur­faces

... appear­ance con­trol is no longer limited to final top­coat inspec­tion.
The orange peel meter scans the opti­cal pro­file of high gloss sur­faces using a laser light source. An addi­tio­nal, infrared - high energy LED allows mea­sur­ing the same struc­ture spec­trum (0.1 - 30 mm) on medium gloss sur­faces. The dull­ness mea­sure­ment is recorded with  state-of-the-art CCD cam­era tech­nol­ogy. It gives infor­ma­tion on the image form­ing qual­i­ties of the sur­face caused by struc­tures < 0.1mm.

Close the appear­ance con­trol loop
for the entire paint pro­cess

Thus, the sur­face qual­ity after each paint pro­cess step can be objec­tively eval­u­ated. No more guess­ing which sub­s­trate layer is influ­enc­ing the final appear­ance. The wave-scan dual will help you to objec­tively ana­lyze appear­ance problems and reduce the time neces­sary for trou­ble shoot­ing.

Exam­ple: Influ­ence of Steel Qual­ity
on Final Appear­ance

wave-scan dual

Step 3: Appear­ance Con­trol after Top­coat
The final appear­ance shows higher short­wave val­ues on the rougher steel panel. There­fore, the smooth panel will appear more bril­liant.

wave-scan dual – a diag­nos­tic tool for trou­ble shoot­ing and opti­miz­ing appear­ance
Now, you can estab­lish appear­ance spe­c­i­fi­ca­tions for each paint layer to ensure the final appear­ance is always on tar­get. 

Step 2: Appear­ance Con­trol after Primer Sur­facer
The primer sur­facer was applied on both pan­els. The rough­ness of the steel qual­ity can still be detected in increased Wb and Wc- val­ues. This primer sys­tem could not com­pletely cover the steel influ­ence.