Shrinkage

Shrinkage refers to the reduction of material dimensions after printing. The degree of shrinkage depends on factors related to the resin composition, curing value, and post-processing.
 

The shrinkage of a solitaire setting ring in Vintage resin at room temperature was measured as 0 size/60 minutes. The measurement was taken with a ring mandrel*. 
 

On the ring mandrel, 1 size represents the inside diameter of the ring.  
1 size = 13.2 mm = 0.52 in

Casting Performance

Two of the most important factors affecting the casting performance of photopolymer resins are their ash-free percentage and their reaction with gypsum. The amount of ash accumulated in the environment of resins that burn in the casting cycle leaves visible defects on the printing surface. Therefore, casting performance can be considered as a selection criterion for the resin to be used. 
 

In Zero resin, the percentage of ash deposit by weight after combustion is expressed as 4%.

Surface Quality

The surface quality of printed objects can be affected by the type of resin used, the resolution of the 3D printer, the positioning of the object on the printing table, and the type and number of support structures. 
 

For models printed with zero resin, the surface quality is expressed as 8/10. 

Flexibility / Stone Setability

The flexibility of 3D printed materials is of great importance for stone setting. In order for the resulting model to be suitable for use in a stone setting, the stone must fit perfectly into the claw cavities in the design and the claws must grip the stone strongly. To achieve these properties, the resin must be flexible and be able to return to its original position after impact.   
 

The maximum Elongation Stress of stone setting resins should not exceed 3 N/mm2 and the percentage elongation should not exceed 50%. 
 

In Zero resin, the elongation stress was calculated as 1.70 N/mm2 and the percentage elongation as 10.29%.