Dear Maneerat / Rangsan,
How are you in these days ?
About the sample & TDS we provided, how about your client`s feedback ?
We suggest you can suggest client to adopt it based on quality side and not for cost effectiveness side.
Because we knew some clients might ask your product to cost down due to decrease cost on process.
If any question or idea, please kindly let us know.
We are glad to share our experience with you.
Thanks,
Tony