LOGO20210319C

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B U S I N E S S

◆ MISSION

  • SANWA PRECISION INDUSTRIAL co, ltd. is specialized in manufacturing Gold and
    Platinum Jewellery over 50 years experience.
  • Our production is starting from melting process to finish product, completed done in house.
  • We always aim to customer satisfaction with the sure quality, service, and cooperation. 
    We strive to achieve quality and lead the industry in design innovation and development, and to keep upgrading our facilities to cater to the changing needs of customers.
 Mission

◆ PRODUCTION

1. available alloy

Gold YG WG RG
18K ○ ○ ○
10K ○ ○ ○
Platinum  
Pt950 ○
Pt900 ○
Pt850 ○

 ＊14K available

2. factory introduction

Wedding Ring
  • 1. seamless ring by hammered, CNC milling. It has advantage at the hardness, brightness, homogeneity,
  • 2. specialized OEM production line for worldwide brand names
  • 3. thousand of models with historical experience makes several correspondence
Machine Made Chain
  • 1. numerous type of chain, and sizes are available
  • 2. quality controlling under “SANWA standard” for sure title, strength, weight control, smoothness, and shinning
Fancy Necklace
  • 1. develop trend style all the time, composed with thousand of spare parts, specially diamond cut beads
  • 2. delicate items are assembled by craftmanship 

 

◆ standard

Length

Length

business neck4

Ring size (Japan)

size 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
internal
mm		 13.00 13.33 13.66 14.00 14.33 14.66 15.00 15.33 15.66 16.00 16.33 16.66 17.00 17.33 17.66
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
18.00 18.33 18.66 19.00 19.33 19.66 20.00 20.33 20.66 21.00 21.33 21.66 22.00 22.33 22.66

Metal gravity

title 24k 18k 14k 10k Pt1000 Pt950 Pt900 Pt850 Sv925
Gravity
18k ratio		 19.180
（1.24）		 15.428
（1.00）		 12.873
（0.83）		 11.455
（0.74）		 21.138
（1.37）		 20.079
（1.30）		 19.053
（1.23）		 18.460
（1.20）		 10.357
（0.67）