Tray and basin combination

A tray and basin combination, said basin being formed of plastic material and having side and bottom walls defining an open-topped well for containing a treatment solution, said tray having a generally horizontal bottom panel for supporting articles to be treated and having horizontal dimensions corresponding with but slightly smaller than said well to permit said tray to be received for vertical movement between raised and lowered positions within said well, said side walls of said basin having a height substantially greater than said tray, lifting means for urging said tray into said raised position within said well, and magnetic anchoring means for retaining said tray in said lowered position within said well, said magnetic anchoring means including a slide member supported by said bottom wall for horizontal movement between first and second positions, and magnetic elements respectively secured to said slide member and said tray, said magnetic elements being oriented to attract each other and retain said tray in its lowered position against the force of said lifting means only when said slide member is in its first position, whereby, when said slide member is shifted from said first position to said second position, said tray is free to rise under the influence of said lifting means.