The basis for the calculation of the affix level is the item level. The ilvl of a Crafted Item is equal to half the level of the crafting character (rounded down) plus half the ilvl of the input item (rounded down). Put another way:

(1) ilvl = int(.5 * clvl) + int(.5 * ilvl)
The ilvl calculated in (1) has to undergo two checks and possible modifications. First, ilvl is capped at 99:

(2) if ilvl > 99 then ilvl = 99
Then qlvl and ilvl are compared. The higher number is used for further calculations:

(3) if qlvl > ilvl then ilvl = qlvl
The final step is to determine the affix level. If the ilvl is smaller than 99 – int(qlvl/2) then the affix level is ilvl – int(qlvl/2). Otherwise the affix level is ilvl*2 – 99:

(4) if ilvl < (99 – int(qlvl/2)= then affix level = ilvl - int(qlvl/2) else affix level = ilvl * 2 - 99.
It's also worth noting that the ilvl, the quality and the properties of the jewel are completely irrelevant and don't affect the outcome at all.

Example

The Blood Weapon Recipe is used to craft a Berserker Axe (qlvl = 86) that was dropped by a monster in the Worldstone Tower in hell difficulty (ilvl = 85). The character used for crafting has level 78 (clvl = 78).

First, ilvl has to be calculated: ilvl = int(.5 * 78) + int(.5 * 85) = 39 + 42 = 81.

Then it's checked if the calculated ilvl is higher than 99. This is not the case, so ilvl remains 81. But qlvl 86 is higher than ilvl 81, so the ilvl is set to 86.

Finally, the affix level can be determined: Since 86 is not smaller than (99 - int(86 / 2)) = 56 the affix level is ilvl * 2 - 99, in our example 86 * 2 - 99 = 73.

So all pre- and suffixes with a level up to 73 can spawn on the Crafted Item.

Note: Since the qlvl of amulets is 1 the term int(qlvl/2) is always 0, so the affix level is effectively determined by ilvl, so affix level = ilvl = int(.5 * clvl) + int(.5 * ilvl).



This is like a total bunch Of Hieroglyph from a foreign language for me :'(

I just want a simple but clear answer to my Question What level char I should craft with if I want to craft some +2 bow 10 ias gloves Under level 30

I know some affix cant proc under a certain level and also read that craft give +5 ilvl so is it actually possible to craft such gloves? ( +2 tab 10 ias ) under level 30?

Formula for a crafted item's level requirement is:
Req = baseReq + 10 + (3 * affixCount)
baseReq: Level Requirement of the highest affix.
affixCount: The number of affixes on the crafted item.

In your particular case, the minimum number of affixes is 2 (affixCount)
The Spearmaiden affix has a level requirement of 30 (baseReq)
30 + 10 + (3 * 2)
----
46

For each additional mod, the level req would go up by another three levels.

TL;DR: The lowest level requirement that crafted gloves with +2 Skilltab can be is 46, so it's not possible.

P.S.: Even +1/10 IAS gloves would not be possible, their level req would be 31.

This post was edited by VoltTackle on May 8 2022 12:13pm

Ty so much sir now ill just aim for 10 ias kb gloves

It's possible but you need to carefully control the final item level of your craft. If it is above 30, you won't be able to get less than 2 affixes, and level req will be 31 or higher. If it is less than 26, you won't be able to get 10 IAS.

The final item level of a craft is half of the old item level + half of the crafting character's level.
One way to so would be to buy magic chain gloves from Act3+ in Normal or any Act in Hell/NM with a level 24 character and then craft items with that same level 24 character.
The final item level of the crafted item should be 26, giving the highest chance of 10% IAS to spawn.

This post was edited by VoltTackle on May 9 2022 09:11am

Your a fucking god man ty son much for clear ans simple answer