What to use for permanent writing on a high-density polyethelene (HDPE) spray bottle? Sharpies wear off right away, even with water-based solutions inside.
And any marker for HDPE that will remain permanent if isopropyl alcohol gets on it?
Thanks.
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I color code with tape. Blue for pure water, green for ferts and red for pesticides and such. I write the contents on the tape which makes changing the contents a bit neater.
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