The quality of Kester Bar and Anode Solder is guaranteed by using virgin metals and strict quality control standards. Kester extrudes its bar and anode products to minimize oxidation, limit segregation and provide a denser grain structure than cast bar. Kester manufactures solder to 5 distinct specifications. Each meets or exceeds requirements of QQ-S-571-F, ASTM B32, and ANSI/J-STD-006.
Kester Ultrapure

Made by a special process which controls the inclusion of oxides and metallic and non-metallic impurities, Kester Ultrapure is the industry standard bar solder for use in high tech electronics applications where lower surface tension and hole filling ability are essential. The purity of Kester Ultrapure far exceeds the requirements of QQ-S-571-F, ASTM B32, and ANSI/J-STD-006.
Kester Ultra Low Dross

Manufactured using the Ultrapure process and containing the same metal purity as Kester Ultrapure, Kester Ultra Low Dross is formulated with a special low dross additive which dramatically decreases dross formation on the solder pot. Lower dross formation decreases joint weakening inclusions in the solder, keeps surface tension low and decreases costly solder loss through drossing.
Kester Ultrapure HAL

Kester Ultrapure HAL bar solder combines the Ultrapure process with electrolytically refined raw materials and low dross additives producing the highest purity solder available on the market.
Ultrapure Plating Anodes

Kester Ultrapure plating anode balls are made in the same process and meet the same metallic impurity limits as Kester Ultrapure bar solder. High pressure extrusion and the ultrapure process assure anodes made with a dense fine grain structure. They permit higher current densities without passivation and guarantee uniform dissolution.
Kester E-Bar

Designed for electrical, electronic and mechanical applications requiring bar solder that meets or exceeds the requirements of QQ-S-571-F, ASTM B32, and ANSI/J-STD-006
Solder Recycling Program

The Kester Solder Recycling Program is an economical and environmentally friendly way to maximize solder dollars. Kester provides customers with credit or payment for solder dross, pot dumpings, and unused solder which are based on published metals market. Customers may return solder in their own containers or those provided by Kester free of charge. The returned material is then recycled or purified for use in appropriate applications.
Solder Analysis Program

The Kester Solder Analysis program is a method for rapid response solder sample analysis. It allows customers to document solder pot impurities for conformance to Federal Specification or ISO quality requirements. Customers can approach us for more details.

Maximum Allowed impurities
Element
Kester
E-bar
Kester
Ultrapure
Ultrapure
HAL
Ultra Low
Dross
Ultrapure
Anodes
Copper Cu
0.020
0.015
0.001
0.015
0.015
Gold Au
0.002
0.002
0.001
0.002
0.002
Antimony SB
0.500
0.050
0.003
0.020
0.020
Cadmium Cd
0.001
0.001
0.001
0.001
0.001
Zinc Zn
0.001
0.001
0.001
0.001
0.001
Aluminum Al
0.002
0.002
0.001
0.002
0.002
Iron Fe
0.010
0.010
0.003
0.010
0.010
Arsenic As
0.020
0.020
0.001
0.020
0.020
Bismuth Bi
0.025
0.020
0.003
0.020
0.020
Silver Ag
0.003
0.002
0.001
0.002
0.002
Nickel Ni
0.002
0.002
0.001
0.002
0.002
Indium In
0.010
0.007
0.002
0.007
0.007

" Kester Solder Analysis Program "
Option A
Option C
Option D
Tin
Tin
Tin
Copper
Copper
Copper
Antimony
Antimony
Antimony
Gold
Gold
Gold
 
Cadmium
Cadmium
 
Aluminum
Aluminum
 
Zinc
Zinc
 
Iron
Iron
 
Arsenic
Arsenic
 
Bismuth
Bismuth
 
Silver
Silver
 
Nickel
Nickel
   
Sulfur
   
Phosphorous