Has anyone out there tried thiourea free etchant?

If so, I would appreciate some feed back on a few questions I have:

- has the claimed benefits (less undercut, higher etching rates,  less
attack on print & etch resists) been realized?

- do you see a lower consumption of TFT etchant in comparison with your old
alkaline etchant - if so can you guesstimate a percentage?

- is the switch over fairly easy?

- are there any negatives to switching?

Thanks for your help


Ted

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