Having been asked to explain on several occasions the genetics of the "Inos". Here is what I know about these varieties, much from experience some from discussion with other fanciers.
The Albino factor erases all trace of melanin's from the entire bird, and a pink colour is seen in nails, beak and skin, but is most noticeable in the eyes, this is due to the skins transparency, so the blood circulating beneath the skin is seen.
Here in the UK we breed the recessive Albino, to produce these birds the Albino factor must be present in either Split or Visual form for it to appear in the youngsters.
The colours used to pair with Albinos to produce splits are variegated Fawn Dilutes and Variegated Silvers, (these Silvers being a Chestnut Dilute Variant). In theory any colour can be used to produce split for Albino birds, in practise the lighter colour varieties produce better quality colour in the resultant Albinos. The use of dark birds i.e. Chocolates tends to produce smudges of grey and the White is not as clean on the Albinos thus produced. From these pairings there can also appear the occasional Dark Eyed White, these birds are particularly useful in the production of Good Albinos.
The Cremino is I believe what is described in other species as a Cinnamon Ino where the brown melanins are not completely erased from the bird. They are sex-linked in inheritance.
They appear to be a pink eyed diluted Fawn, but are a separate mutation that is not affected by combination with other colours, except when combined with the Grey Factor to produce the Greyino.
The first Cremino was discovered in Denmark in 1983 in a nest of Dark Brown Bengalese. It has reached its present exhibition form due to skilful combination of Dutch birds by fanciers in Holland & Belgium. The best birds to use in their production are those with the greatest amounts of melanin, these being the Black Browns (Chocolates), the aim is to produce well -coloured specimens for exhibition.
The Creminos produced from the lighter varieties tend to be pale in colour, and not generally good exhibition birds.
I have produced more by accident than design Creminos that have little if any melanin in the birds, due to accidental introduction of Cremino into my Red Grey birds in the past, when I knew little about them. These I believe have been developed further on the Continent where they now have these sex-linked "Albinos" as a separate colour variety. It's my belief these birds are still genetically Creminos.
When combined with the Grey Factor the Cremino gives us the Greyino .
This works in much the same way as when we combine the Fawn with Grey, by reducing in the offspring the amount of the Red phaeomelanin and the Black Brown eumelanin to give the Grey colouring to the feathers. These birds although not hard to produce, take patience as it takes several generations to combine a Recessive and a sex-linked trait into one bird.
Summing all this up, know Ino birds are the recessive Albino, and the Sex-linked Cremino that can also be combined with Grey to give us the Greyino.