That's unfortunate. I have a half dozen different brands and materials of white, PLA, ABS, HIPS (and ASA in a sealed box). Of the ones I just checked, the unknown brand stuff appeared to have a yellow cast to it. The HIPS is probably the whitest, only outdone by white NinjaFlex. My spools of MatterHackers Build PLA are a toss-up, uncertain how those would look, but the MatterHackers ABS is clean white. I think it's a gamble, unless you can get a sample sent to you for testing.