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" 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. Call girlzip
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 ? You might be looking for high-quality, "solid" (heavyweight)