Here are the performance tests and test reports of HLT HUAYUAN UHF Laundry Tags.
Remarks
U8: With NXP UCODE 8 chip (eg. HLT7015U8)
U9: With NXP UCODE 9 chip (eg. HLT7015U9)
M: Cube (eg. HLT7015U8M)
Q: Wire type with circle (eg. HLT5815QU9)
HS: Heat-sealed on textile (single-layer structure) (eg. HLT7015U9-HS)
HSD: Heat-sealed on textile (double-layer structure) (eg. HLT7015U9-HSD)
MV: Mean value of 3 or 5 tags
Free air: tag only / no textile
In textile: tag was put in some textile layers
We started a washing test with HLT5512U8-HS and HLT7015U8M-HS
The tags were attached by heat sealing. (204°C 14s) After 200 washing cycles all of them worked fine.
To check if something changed during these washing cycles we repeat the measurements. (Tags are still on the bed sheet where we placed but not in between of multiple textile layers)
It seems that the tags lost a little bit of performance.