why aluminium paste color changed to dark
due to aluminium paste have excellent reflective and glossy metallic , so the finished paint film can be accordingly different angle get different effect .
normally aluminium paste use for metallic industry paint , boat paint , coating and so on ,
but during product aluminium paste will be easy get oxidation or pollute , then get dark and lose glossy .
totally from this 3ways :
1 pollute , during sieving aluminium paste , when have impurity metallic then will make it pollute and get darker , lose glossy .
2 oxidation , during product aluminium past easy get oxidation , valcantion then get darker .
3， other additives , due to add disagree ,during o2 happens react , then get darker .
aslo have other reason get darker .
when you aluminium paste get darker , we are suggest such way to solved it , one is use have antioxygen Phosphite , can be active prevent freedom aggregation .
this is no way from original solved oxidation problem , but can be have active effect .
