You say
>Could anyone suggest a less expensive ingredient to the cyanotype recipe
>than ferric ammonium citrate ( local price A$85.50per 500g)
Try telephoning Aldrich on 61 02 899 9977 or fax 899 9742 at Unit 2, 10 Anelia
Avenue, Castle Hill, NSW 2154.
Their UK catalogue price is L11 for 500 g.
Terry King