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Why is solder paste refrigerated?
Keeping solder paste refrigerated will maintain the viscosity of the carrier and prevent the spheres of solder from settling to the bottom of the container.
How long can solder paste sit out?
AIM solder pastes typically have a shelf life of three to six months when stored at room temperature (22°C/72°F).
Does solder paste go bad?
A solder paste typically has a shelf life of 6 months when refrigerated.
Can you use old solder?
Solder can definitely expire. This is because of the flux which can separate or in the case of solder paste dry out and become ineffective.
How do I choose solder paste?
When choosing a solder alloy, there are four key considerations: lead content, melting temperature, alloy powder particle size, and joint strength. Lead content, melting temperature, and strength are typically addressed at the same time.
Where is solder paste supposed to be stored?
Solder Paste StorageSolder paste should be received in and stored as soon as it arrives. Solder paste should not remain on the receiving dock and should be stored in refrigeration at 40°F. In most cases, refrigeration will double the shelf life of the material as compared to storing it at room temperature.
How much solder paste do you need for SMT?
Inside the wire is a bit of flux (thats the smoke that comes off of the iron when soldering). The flux is often rosin type, no-wash type. When doing SMT work, you can use thin wire but often times even that isn’t good enough, you need to use paste! Paste comes in tubs of 1/2 – 1 lb or so.
How big is a tub of solder paste?
Paste comes in tubs of 1/2 – 1 lb or so. The paste has consistancy of smooth peanut butter and is made of ball of solder suspended in flux. As the paste is heated in an oven the solder melts and the flux burns away leaving a solid solder joint.
How big should a bead be for solder paste?
The initial solder paste bead should be the full length of the printable pattern on the stencil, in a diameter of approximately 0.5″. During the first few print strokes, the squeegee blades will load up” with solder paste that will then flow out across the length of the squeegee blades, seeking its own level.