Parrac Limited is the owner of the intellectual property, know-how and strains of albino Ophiostoma piliferum, known as Cartapip 97, and as Sylvanex 97™.


Cartapip 97 is a unique pulping aid that improves mechanical and chemical pulping of wood chips, and keeps wood whiter. Cartapip 97 is a fungus that grows through the resin canals reducing the extractives as it grows through the chip. This process appears to create pathways through the chip that can improve the penetration of pulping chemicals.

The active ingredient in Cartapip 97 / Sylvanex 97 is a selected white (albino) strain #97 of Ophiostoma piliferum. The product consists of freeze dried light brown flakes, which are mixed with water to a dilute suspension. This suspension is sprayed onto the wood chips or solid wood. Storage of Cartapip sprayed wood of more than six days allows the fungus to grow through the wood. Cartapip is sold by the Activity Unit (AU) and the typical recommended dosage for wood chips is 1 AU per ten tons wet weight wood. The dosage may be varied depending on wood species, temperature and incubation times.



The product consists of a specific albino strain #97 of Ophiostoma piliferum. The albino strain #97 was made by classical mating of Ophiostoma strains isolated, and selection, resulting in stable strains that degrade pitch components and are albinos i.e. non-coloured hyphae, therefore making no stain which is caused by melanin. Cartapip was developed without the use of mutagenesis or genetic engineering.

Cartapip 97 was marketed by Sandoz Chemicals Corp. from 1991-1995, and subsequently by Clariant Corp. In 2000, Clariant Corp. sold the Cartapip technology and relevant patents to AgraSol. In December 2004 the Cartapip technologies, know-how and IP were purchased by Parrac Ltd, a New Zealand business run by Roberta Farrell, one of the inventors and leader of the development team of the original technology.

Health and Safety

Cartapip 97 / Sylvanex 97 have USDA certification as a non-pathogen, has had full acute toxicity testing at the Huntingdon Research Laboratories with no demonstrated negative effects, and EPA ruling determining that it is not subject to Federal Plant Pest Act regulations and not regulated by TSCA. See Material Safety Data Sheet for handling safety. download