Stage 5: Scaling
The Horticulture Innovation Lab at the University of California, Davis is partnering with in-country businesses and entrepreneurs to establish DryCard manufacturing, marketing, and sales. DryCard is currently available for purchase in 10 countries.
Food Safety and Standards, Post Harvest and Public-Private Partnerships
Food Safety and Standards, Post Harvest and Public-Private PartnershipsSEE LESS
Tanzania, Rwanda, Guineaand 7 MoreSEE ALL
Tanzania, Rwanda, Guinea, Thailand, Guatemala, Mexico, Ghana, Uganda, Sierra Leone and NepalSEE LESS
Countries Implemented In
Funds Raised to Date
Drying is a technique used to preserve harvested products, but knowing when products are dry enough can be difficult. When products are not dried below 65% equilibrium relative humidity, they can grow mold and produce harmful mycotoxins such as aflatoxin. Common methods to test for dryness such as biting, touching, or sniffing the product are unreliable and inaccurate. Electronic devices that measure moisture or humidity are often too expensive and difficult to use.
The DryCard is a low-cost and simple tool that measures food dryness by changing colors to reflect the equilibrium relative humidity of a product. This technology allows users to ensure that their product is dry enough to prevent mold growth and mycotoxin production.
Smallholder farmers, traders, and aggregators
Mission and Vision
To reduce postharvest losses and increase the food safety of dried products.
The DryCard combines a strip of humidity indicator paper with a color scale to indicate the level of humidity, and instructions printed on the card for how to use. To use the DryCard, simply store the card in a sealed plastic bag or glass jar with your product, wait 30 to 60 minutes, and then look at the color of the humidity indicator strip. If the card is blue, this means your product is properly dried and safe to store. If the card is pink, this means your product is still wet and may grow mold and produce toxins.
DryCard is low-cost and can be made from locally available equipment and materials. DryCards are reusable for up to 3 years and can test any kind of dried product. DryCard has instructions printed directly on the card for how to use which can be translated into different languages or pictures. It does not require electricity, batteries, or regular calibration.