Summary for wavelength for testing bonderite t-5900 Discussion
The focus keyphrase "wavelength for testing Bonderite T-5900" is the central question in this short thread: Glen Attridge asks what wavelength setting should be used to test Bonderite T-5900, also identified as Alodine 5900. The excerpt does not include a technical answer or a confirmed measurement setting, only the question itself and the poster’s location. Because no reply text is shown, there is no documented recommendation from the named contact Jon Barrows or anyone else in the source provided. The practical takeaway is that the thread, as excerpted, is an unanswered request for the correct spectrophotometer wavelength for this coating, so readers would need the full discussion or a manufacturer/source specification to proceed confidently.
Q. Looking to find the wavelength setting for testing Bonderite T-5900 [Alodine 5900]?
Glen Attridge
– Ontario Canada
May 27, 2025
MacDermid specifies Hach Method 8024, The Hach datasheet lists 540 nm if you use the spectrophotometer method or 560 nm if you use the colorimetric method.

Jon Barrows, MSF, EHSSC
Independence MO
