It's been almost two years since I've purchased any washing powder. Previously I had a brief stint of liquid laundry making when we lived in Canberra. But I was not terribly good at organizing myself to "cook up" a batch. I find the powder version a little quicker and easier to make. Over the time I've been making it I've adapted the ingredients to suit us here.
I don't think I could ever go back to bought laundry powder. Aside from the high cost, the scent of the commercial powders has become unbearable to me now, though I admit that previously I was very fond of the various brands and their own signature scent. Also being far better for the health of your family and the environment.
Here is the usual batch that I make up. With almost daily washing, and believe me there is a lot of it in this house, this lasts us quite awhile.
4 cups grated soap flakes ( I usually use Lux flakes, but sometimes I grate Sunlight soap as this is more cost effective)
4 cups powdered washing soda (not the crystal kind)
1 cup borax ( you can increase this amount if you wish, but I use it very sparingly as all our water is recycled through our septic and then into the garden)
2 cups bicarb soda
4 dashes eucalyptus oil (or other essential oil)
I pop all this straight into the tin, close the lid and give it a really good shake (holding onto that lid!) My laundry tin came with a little scoop and I use it to measure it into our front loader. I use a full scoop for a really soiled load and a little less for lighter loads. This mixture is also great for nappies - bicarb being very beneficial for nappies.
Rhonda from Down to Earth has a great washing liquid tutorial here
Do you make your own?