Chromajet is an Australian pseudo-branding for various products sourced from overseas suppliers who do not have their own distribution in Australia, or for products where the rights to their own brand name are not available in Australia (e.g. Mitsubishi papers, as Mitsubishi Electric in Australia won't allow use of the brand name by other companies).
These products are often very cost effective as they're usually imported in bulk form then re-packaged locally, making them much cheaper than products imported already in boxed form. Very often these are excellent, premium level products sold under their correct brand name at premium prices in other markets. Well worth a look, especially their metallic & double sided paper options, or if you're looking for a cheaper alternative to the more classically branded products.