Solder Connection

Solutions in Soldering Technology

PureCore Water Washable Solder Wire

ALPHA® Pure Core is an organic activated, water soluble flux cored solder  that meets the Corrosion Resistance Test and Surface Insulation  Resistance requirements per IPC-TM-650 ALPHA Pure Core contains  a water soluble resin derivative of rosin and a buffered organic  activation system. This efficient flux produces bright, shiny solder connections, even if cleaning is delayed for several days.

Key Products Features & Benefits: 

  • Recommended for use in any  electronic hand soldering application where high fluxing strength and  the ability to clean with water are desired.
  • Low smoke and odor characteristics which make it particularly suited for touch-up and repair of printed circuit boards.
  • Effective activator system enables the flux to penetrate even heavily tarnished surfaces
  • J-STD Classification: ORM1


Product Number : Purecore

Prod. No. 144418
SAC305 0.015" Dia 3.3% Flux 1LB Reel

Prod. No. 144417
SAC305 0.032" Dia 3.3% Flux 1LB Reel

Data Sheets and Info

Health & Safety

Technical Bulletin

ROHS Certificate


Q - Is Alpha Pure Core solder wire also available in a 63/37 Alloy?
A - Certainly, this solder wire is available in both SAC305 and leaded 63/37 alloys.

Q - Can the post soldering residues be left on the solder joint when finished?
A - Generally these flux reidues are benign after soldering. You should however be aware that the flux activation is classified under J Std as being moderate. If you require a product for more critical applications then you should consider Alpha Fluitin AS or Alpha Telecore Plus which is classified as having a low activation level.

Q - How does SWG (Standard Wire Gauge) compare to metric sizes?
A - 26 SWG is equivalent to 0.4 mm Dia.
22 SWG is equivalent to 0.7 mm Dia.
18 SWG is equivalent to 1.2mm Dia.

Q - What is the smallest wire Solder Connection currently have avialable exstock?
A - Currently our smallest diameter wire is 0.010" as shown below.
Alpha Telecore Plus is Lead Free SAC305 alloy
Alpha Reliacore 15 is leaded 63/37 alloy

Q - Health and safety have requested that l look at solder wires that are rosin and resin free do such products exist?
A - Alpha produces a solder wire that is called FT2002. This product contains no rosins or resins and is therefore deemed to be Colophony Free.
This solder wire comes in both Leaded 63/37 and Lead Free SAC305 in most common sizes.

Q - Do l have a choice of reel sizes?
A - Traditionally the electroniocs market has always been 500 gm reels. This continues through today, however the finer wire diameters such as 0.4 mm will only have 250gms wound on to a 500 gm reel.
If the wire is manufactured in the USA then this comes on 1LB reels.
Other reel sizes are available but must meet minimum order quantities in production

Q - Do l need hot water to wash off the residues after soldering with Pure Core solder wire?
A - Warm water works better than cold as the residues will more readily dissolve into the water. However hot water may have an opposite effect on your cleaning ability. To give a shine to the board finish than the addition of a sapponifier similiar to Alpha 2110 in the first stage would work well.

Q - What is colophony and can it cause any health issues?
A - Colophony is a generic term for rosin, this is the sap or sticky substance that derives from pine and spruce trees. Its "stickiness" lends itself to being used in a wide range of products. We have traditionally used this product in fluxes due to these specific properties it can however lead to breathing difficulties and skin sensitivity. Always use fume filtration when soldering and change filters regularly.

Q - What is the difference between rosins and resins?
A - The terms are often used interchangeably, but rosin is a naturally occurring substance, and resin is either a modified rosin or completely synthetic material. Rosins are plant based products and are subject to more natural variation than resins, however resins are commonly used in newer flux formulations due to their more consistent performance.

Q - How does IPCJ-STD-004B flux classification work.
A - Flux designation has three components. The first two letters, RO, RE or OR, represent the basic chemical composition: rosin-based, resin-based or organic acid-based. The next component is flux designation, L, M or H, which describes the flux’s activity level as low, medium or high, and the final component, 0 or 1, this indicates if halides are present.

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