When dealing with foils at 0.05mm or thinner, we offer 2 options: Light Tight tested foils (denoted as LT in our catalogue) or standard untested foils (denoted as Sizes in our catalogue).
When the foil thickness surpasses 0.05mm, there's no requirement for a light-tight test, as these foils become naturally denser and provide a more effective barrier against light.
Remove possible surface impurities by immersion in aqueous HF 1% / HNO₃ 10% / HCl 20% by volume, 1-3 minutes at 60C.
Diameter4mm - 50.8mm
Size10mm x 10mm - 300mm x 300mm