Silver Chromate Paper for Solder Flux Examination List

IPC-TM-650, Method 2.3.33, Presence of Halides in Flux, Silver Chromate Method, defines the procedure for determining the presence of chlorides and bromides in soldering flux by visual examination after placement on test paper.

The following vendors provide silver chromate test paper applicable to this test method.  This list is non-comprehensive and is not guaranteed by IPC to be fully accurate, nor are any of the vendors listed endorsed by IPC or members of the IPC 5-24a Flux Specification Task Group.  This list is dynamic and IPC recognizes that other capable equipment providers may exist and will be included as IPC is notified.


Product ID

Web site

CTL Scientific

SC-100 Silver Chromate Paper (Box of 100 50 x 50 mm strips)

If you are familiar with another equipment provider whose test paper meet the requirements of IPC-TM-650, Method 2.3.33, IPC encourages your input. Please provide your name, e-mail address and company name when providing a written e-mail to


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