This is a good question . Through thermoforming, the paper tray will be more regular and the surface will be better looking. However, not all paper trays are thermoformed, it depends on the usage. Paper trays that are not thermoformed will have better toughness and lower cost.
There is no difference for the two pulp trays ,they are same .This is the thermoforming processing for molded pulp tray .And 2 pcs pulp trays will be done at a time .
