@toddreedjewelry reminds me of the bottom of a Montana trout stream. Beautiful! I can hear the sound of the water!
We've searched for high platinum-content platinum solders for quite a while, then we learned that you could actually buy 90%, 92.5%, and 95% platinum solder (depending on melting point)! The best part is that you can actually get low melting point solder with no discoloration! Thanks to PM West for this great product! Learn more here.
Sometimes important details that contribute to great results are overlooked in models we receive for platinum casting (which is another reason to consider having us make your model)!
However, because great results and happy jewelers is the goal, we include quick fixes and modifications as part of our service. Here's a quality control action list to implement before shipping your model:
1) Filling in holes that obstruct the flow of the metal
2) Filling in cracks or air-bubbles in models
3) Touching up surface flaws that would require filling in with metal in the casting ("innies" from broken of RP supports etc).
4) We prefer to carefully fill-in holes on certain design features because they can be easily drilled out, and to minimize platinum waste.