It's possible this is a niche product name or a mishearing of a term like "Kraft paper" or a specific "Gsm" (paper weight) rating.
To make sure I'm giving you the right info, could you tell me a bit more about what this paper is used for? For example, is it for , crafting , or perhaps industrial packaging ? Call girlzip
If "solid" refers to the thickness and "girlzip" is a misspelling of a brand or technical spec, you might be looking for heavyweight cardstock or solid bleached sulfate (SBS) board used in packaging. It's possible this is a niche product name
You might be looking for high-quality, "solid" (heavyweight) paper used for calligraphy or fountain pens. Brand names like Clairefontaine or Rhodia are often described this way. If "solid" refers to the thickness and "girlzip"
It looks like "Call girlzip" might be a typo or a very specific term. Based on the context of "solid paper," I have a few ideas of what you might be looking for: