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Features

  1. Rosin Flux : In traditional application of PCB, such as TV and Radio, it does no harm, only leaving rosin layer on the surface, still if provides good stability. The basic structure is IPA 70% Rosin 30% Activator 0.5%. It is represented by K-500.
  2. Wash-free Flux : It is of organic acid, IPA, Rosin and minimum leveling agent. They are represented by K-565 / K835.
  3. Water washable flux : Organic compound, poly-alcohol and IPA structure, it is represented by K-103.
  4. Aqueous Flux : Structured with organic amine with pure water as base, added with minimum moisture agent. Represented by K-240.
  5. Lead-free Flux : Presently there is no halogen-free, lead-free flux in the world; with the emphasis on lead-free, only bromate salt, bromide and organic acid as synthesis structure. It is represented by 92FT KP-15
  6. Paste flux : Solder paste is the base of flux and designed specially for BGA use. Lead containing flux is represented by K-37, while Lead-free is represented by K-41
  7. Detergent : Generally the best detergent is alcohol and IPA. They are of dual polarity and is applicable for both high and low polarity, but the effect is less than ideal. Hence appropriate amount of solvent is added to IPA to improve. When Environment Protection is key issue, natural citrus oil will be considered to have also the cleaning effect. Representing product is K-352.
  8. Thinner : Since Flux is IPA based, it should stay with IPA, and adding fragrant and number would not have practical importance. Aqueous Flux is added with 10-20% pure water as thinner. The representative product is IPA.

Specification

Model Resin Flux solder specifications/features
Shiape color Solidity Specific gravity Halogen % Insulation resistant Expansion Corrosion Cleaning Applications
K-500 brown yellow 20% 1% 0.8% 3x10x12Ω or higer 96% pass washable use for PCB or single board, more residue
K-100 light yellow 10% 0.81 2% " 95% or more " washable multiple-point soldering, suitable for dense points 
KP-565 transparent 0% 0.8 2% " " " No clen use for mutiple-layer PCB, better tidy effect after soldering
KP-835 pale yellow 1% 0.8 2% " " " "
KP-15 pale yellow 2% 0.8 2% " " " "
JR-92FT light yellow 4% 0.81 2% " " " " No clean, use less in case of short
K-565A light yellow 6% 0.81 2% " " " " use for platting copper wire 
K-103 transparent 15% 0.85 2.5% － 96% － must clean after soldering for multiple-layer PCB, must use water to clean
K-41 light yellow 40% 0.9 1.5% 5x10x12Ω 95% " unwashable use for BGA balls
K-37 light yellow 40% 0.9 1.5% 5x10x12Ω 95% " unwashable SMT re-soldering
K-240 transparent 30% 1.2 10% － 96% － residue must be cleaned by water suitable for welding hardware or electrical parts
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