To measure the Viscosity of solder paste you can use following equipment:
Viscometer : Brookefield RVTV+
Spindle       : TF
RPM           : 5

The Method is given in the IPC Test procedures.
> ----------
> From:         Alderete, Michael[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;Alderete, Michael
> Sent:         Monday, March 22, 1999 2:04 PM
> To:   [log in to unmask]
> Subject:      re: Paste Viscosity
>
> Rob-
>
> cps stands for centipoise, a unit of viscosity. KCPS is thousands of
> centipoise. ASTM, and possible IPC, have methods for testing paste
> viscosity. Also, try suppliers such as alphametals (Cookson).
>
> Michael Alderete
>
>
>
> Rob wrote...
> ------------------------------
>
> Date:    Mon, 22 Mar 1999 14:31:17 -0500
> From:    Rob Watson <[log in to unmask]>
> Subject: Paste Viscosity
>
> Boy, I am full of questions today... As you can tell, I am really digging
> into
> the screen printing operations.
>
> I have one more question, I have a troubleshooting guide for the SMT
> process.
> Actually, a presentation someone gave me from a SMTA meeting about 2 years
> ago.
>
> Anyways, this guide recommends that solder paste viscosity be between 1000
> KCPS
> +/- 10%.
> Does anyone know what this is?  How would you go about testing to verify
> this?
> What test methods and equipment would you use to do this?
>
> Thanks again for your support in advance,
>
> Rob Watson
> Sanmina Corp.
>
> ------------------------------
>

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