Salt cucumbers and set aside for a couple hours
Warm the ice vinegar and water in a saucepan, stir in the sugar until dissolved
Remove from heat and let cool
Transfer the cucumbers into a sealable container, a mason far works well for this.
Add in the crushed peppercorns, cumin and coriander seeds along with the diced chilies.
Pour over the sweetened vinegar to cover.
Close container and shake well.
Set aside in the refrigerator for one week