tray what could she be made of?

[wd40]

Hi I have this tray and I am having trouble figureing out what its made of. I use a 14K gold test solution it remains clear but turn metal black, I use 18 Karat solution and it turns and dries milky white see pic..the tray measures 16" X 12 1/4" and it is almost 1/4" thick. any ideas what it is made of..also I can bend a corner up or down fairly easy, so I thought it might be lead so I got and old lead fishing sinker and tried both 14K and 18K solutions and no reaction at all, what could she be made of?





.

[wd40]

I forgot to add there is no hallmarks or any id marks at all..
.

[byron mac donald]

Hi WD-
May I call WD or is it mister 40? just kidding. Could it be made of leaded pewter? Just for my ongoing education, Why do you use a gold solution? does it have something to do with checking for silver content?

Thank You-
.

[admin]

It looks to be plated brittania metal, which is an alloy similar to pewter and commonly used in the 2nd half 19c as a plating base.

.