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 2 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 the 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 Yellow resin, after combustion, the percentage of ash released by weight is expressed as 1%. 

Surface Quality

The surface quality of printed objects can be influenced 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. 
 

The surface quality of models printed with Yellow resin is expressed as 10/10. 
 

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 ensure 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 Yellow resin, the elongation stress was calculated as 0.86 N/mm2 , and the percentage elongation was calculated as 18.62%.