08/11/2025
The density of PVC formwork should be a specific value and be marked explicitly, rather than un-marked or a wide error range. Wide density error range means wide controllable profits. This is an obvious method to distinguish the quality. Take the popular dimension 1220x2440x18mm for example :
If one supplier quotes USD30.00 per piece of 1220x2440x18mm
0.70g: weight 37.51/piece, means US$0.80/kg
0.75g: weight 40.19/piece, so the weight difference =40.19-37.51=2.68kg
Then, the cost difference between 0.70g and 0.75g should be 0.8x2.68=US$2.14
It means, this supplier will has extra US$2.14/piece profit space to operate , over 7% space.
Besides, if thickness tolerance is 0.5mm, then the weight difference for one piece will be over 1kg, means another US$0.80/piece space for extra profit.
What's more, as mentioned, to save costs, some suppliers add overmuch calcium powder to get higher density.
So these are where the cost differences come, and one of the reason why they don't mark the accurate density.
We can guarantee the dimension tolerance: thickness ≤0.1mm, diagonal ≤3mm and density tolerance ±0.5%. Check more of our quality: https://www.sdjingfang.com/Azure_blue_color_PVC_formwork/1963.html ; [email protected]; +86 178 0611 2299 (WhatsApp)
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