At the starting point of the scratch and sniff stickers custom, there is a standard adhesive label, to which a special paint consisting of:
- a liquid carrier such as a water-based ink;
- a previously microencapsulated perfume component.
Special varnish is part of a new generation of scented inks, which allows the production of scratch and sniff stickers custom, but let's go into detail and discover how they are produced and why they can be activated through touch.
First of all, it must be said that the conformation of this paint allows you to choose how it is made to take root; the recommended printing methods are mainly two: flexo printing and screen printing. This part concerns the first component mentioned above, the liquid carrier; the perfumed feature must be added.
The latter is previously "microencapsulated", or the chosen compound of aromatic oils is trapped in microscopic capsules. Micro-encapsulation is a process that consists of coating minute droplets of liquids or gas bubbles with a thin film, usually made up of natural or synthetic polymers, to form microcapsules to preserve a substance. This protective veil allows the perfume to remain stable until the moment of breaking or when pressure is exerted by rubbing the label. When these microcapsules are "scratched", they die and release the chosen fragrance.
The perfumes can be chosen from a standard library, where you can find the most traditional and used ones, from vanilla to rose. Still, you can customise perfumes by agreeing with the scratch and sniff stickers custom supplier. Just provide the oily variant of the fragrance to microencapsulate it and add it to the paint!