My jeweler agreed to make my ring out of 900 Pt/Ir instead of 950 Pt/Ir since I liked the extra hardness of the 900. The ring will have an extensive amount of handwork after casting; thus, Pt/Ru and Pt/Co were not good selections.
The caster that he typically deals with came back and said that 900 Pt / Ir casts much poorer than 950 Pt/Ir and said that there are sometimes even bubbles in the ring. Does what this caster is saying hold water?? I need to figure this out today as my jewler is going to check around a bit; however, I fear that he is going to come back and re-reccomend 950.
Any advise or reccomendations are appreciated. My ring is being fabricated in San Francisco if that is of help.
Below is what I know about the two metals from John Pollards excellent post.
Cheers,
Dale
Pt900/Ir (900 parts platinum, 100 parts Iridium) is a good hard alloy. A great compromise between relative hardness for easier polish it has excellent white color and is still quite malleable. It is excellent for both casting and handmade work. Less pressure is required to set gemstones than with harder alloys. It is resistant to scratching & bending and over time is very resistant to signs of wear.
The caster that he typically deals with came back and said that 900 Pt / Ir casts much poorer than 950 Pt/Ir and said that there are sometimes even bubbles in the ring. Does what this caster is saying hold water?? I need to figure this out today as my jewler is going to check around a bit; however, I fear that he is going to come back and re-reccomend 950.
Any advise or reccomendations are appreciated. My ring is being fabricated in San Francisco if that is of help.
Below is what I know about the two metals from John Pollards excellent post.
Cheers,
Dale
Pt900/Ir (900 parts platinum, 100 parts Iridium) is a good hard alloy. A great compromise between relative hardness for easier polish it has excellent white color and is still quite malleable. It is excellent for both casting and handmade work. Less pressure is required to set gemstones than with harder alloys. It is resistant to scratching & bending and over time is very resistant to signs of wear.
Pt950/Ir (950 parts platinum, 50 parts Iridium) is a good medium-hard alloy which is malleable and well-suited for bench work. Good for casting and excellent for handmade pieces, it is the best choice for soft or fragile gem setting. The greater softness requires a longer polishing process. It is less scratch and bend resistant than harder alloys but holds a stone better if an impact occurs; like a shock absorber. Over time it is very resistant to signs of wear.
300x240.png)