Light Yellow No Clean Rosin Active Flux Soldering Medium Solid Content

Place of Origin China
Brand Name Wuxi Top Chemical
Certification ISO9001
Model Number NS319T2
Minimum Order Quantity 10 tons
Price Call/negotiable
Packaging Details 1 container
Delivery Time 5-8 days
Payment Terms L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability 500 tons/month

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Product Details
Advantages Halogen-free Solid Content (%) 5±1
Flash Point (T.C.C) 14℃ Specific Gravity @20 Degrees Celsius 0.801±0.008
Storage Time 12 Months Silver Chromate Paper Test Pass Through
Name Light Yellow Flux Recommended Thinner FD5050 Thinner
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light yellow active flux soldering


active flux soldering medium solid content


no clean rosin flux ISO9001

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Product Description

Rosin type liquid flux  light yellow liquid medium solid content flux


1. Instructions for use

△ In order to meet the requirements of stable soldering performance and electrical performance reliability, the process establishment related to circuit boards and components must meet the requirements of solderability and ion clarity. It is recommended that the assembler put forward relevant regulations for the suppliers of related materials, and require the incoming material analysis certificate or the assembler to carry out incoming material inspection.

△ Handle the circuit board carefully during the assembly process. Only grasp the edge of the circuit board. It is recommended to use clean, lint-free gloves.

△ Use FD5050 thinner to clean the conveyor belt, chain teeth and clamps regularly to avoid the increase of residues on the edge of the circuit board after assembly.

△ When changing the type of flux, use FD5050 thinner to thoroughly clean the flux container, flux tank, flux spray system, etc.

△ The density and uniformity of the flux coating is a key influence on the successful application of no-clean flux. It is recommended to use a flux coating with a density of 500 to 1500 micrograms per square inch.



2. Technical parameters

Parameter Typical value Parameter
Typical value
Light yellow Transparent
insulation impedance (85 ° C /85%RH) >1×108Ω
Solid content (%) 5±1

Closed flash point (T.C.C)


water soluble resistivity 36000 ω ·cm recommended thinner FD5050 thinner
Cl-content (WT/WT)% 0 Silver Chromate Paper Test pass through
storage time 12 months Specific gravity @20 degrees Celsius 0.801±0.008


△ Preheating makes the flux on the circuit board dry, enhancing the removal of oxides and the formation of good solder joints. The preheating temperature depends on various factors, such as conveyor speed, types of devices and substrates.

△ Using compressed air with degreasing and dewatering to foam during foam coating, so as to maintain sufficient flux on the foam core. Use a pressure regulator to adjust the air pressure to produce uniform bubbles and optimal height.

△ The flux applicator needs to add a thinner to supplement the evaporation loss and maintain the balance of the flux composition.

△ Debris and contaminants will accumulate in the flux coating of the loop. For the consistency of the soldering operation, the no longer used flux should be disposed of regularly. After emptying the flux, use the thinner to clean the container and other tasks, and then fill the container with fresh flux. The flux should be given a few minutes of foaming stability before the soldering can be resumed.




4. Flux picture

Light Yellow No Clean Rosin Active Flux Soldering Medium Solid Content 0