Couldnt find it on the UESP though it is mentioned under alchemy, how it works is not.
Aside from that, the UESP has really fallen in favour with me recently, due to block-headed editors deciding that their own fantasies are more important than quoted lore, and who refuse to allow people pointing this out.
Print half an essay complete with sources on a talk page and it gets deleted under 'this is going nowhere', while the wrong information keeps being displayed on the page... Im done with those [bad word].
Here it is... It's under "Enchanting"... It's a long one...
Optimizing
When getting into end-game situations, or simply wishing to maximize your damage outputs,one can use Enchanting, Alchemy, and Smithing to do incredible things for both melee and ranged users.
1. Get enchanting, alchemy, and smithing to 100. Smithing is the easiest to power-level, with enchanting close behind. Use your 5 training sessions on Alchemy, as it takes the longest. If you can, grab any necessary smithing perks for your armor/weapon choices. If you have the perks to spend, grab all levels of the pure power perks (the first one) for alchemy and enchanting, and the insightful enchanter perk. 2. Buy or make a bunch of cheap sets of clothes or armor of any kind for: Hands, Feet, Body, Necklace, Ring, and helm. 3. Stock up on grand soul gems and certain ingredients by any means necessary. 1. Ingredients for Fortify Enchanting (Choose any two of the four): Blue Butterfly Wing, Hagraven's Claw, Snowberries, and Spriggan Sap. 2. Ingredients for Fortify Smithing (Choose any two of the four): Blisterwort, Glowing Mushroom, Sabre Cat Tooth and Spriggan Sap. 3. Ingredients for Fortify Restoration (if you want to use the stackable Restoration 'glitch') (Choose any two of the five): Abecean Longfin, Cyrodilic Spadetail, SaltPile, Small Antlers and Small Pearl 4. Make sure you know the enchanting effects you want on your final armor,as well as Fortify Alchemy and Fortify Smithing 5. At the enchanter enchant one full set of Fortify Alchemy apparel. A set of alchemyapparel will have one item for head, neck, arm and hand. e.g. Circlet, necklace, bracers, and ring. (Alternatively, if you don't mind using the Falmer helmet glitch, you can wear one together with the mask Krosis or an alchemy enchanted circlet, giving you five alchemy buff slots instead of four.) 6. Then, wear the alchemy clothes, and verify using Active Effects that the enchanting effects are active. There seems to be a bug where sometimes enchanted items' effects are not active upon wearing. To correct just remove and then re-equip enchanted items. (At this point, you can also use the Fortify Restoration exploit, see notes below). 7. Now make some Fortify Enchanting potions using combinations of: Blue Butterfly Wings, Hagraven's Claws, Snowberries, and the Spriggan sap. Alternatively, there are two respawning Enchanter's Philters in the Archmage's Quarters at the College of Winterhold; these increase the strengthofenchantmentsby 20% for 60 seconds. 8. At the enchanter, drink the strongest enchanting potion you made orfound, and enchant a new set of items with Fortify Alchemy. 9. This works twice, but after two iterations the Fortify Enchanting potion will not increase the item's enchantment strength (xbox tested). You can also drink 'Fortify Restoration' potions and re-equip each set of Alchemy clothes before you make the next round of potions. 10. Make some final Fortify Enchanting potions, and some Fortify Smithing potions (using Blisterwort, Glowing Mushrooms, Sabre Cat Tooth, and Spriggan Sap) to get your enchanting back up to max, and enchant your used weapons and armor as you please. 11. Also, at the enchanter (and while your enchant potion is on) enchant a final set of cheap items with Fortify Smithing. Then, head to a smithy with a grindstone and workbench. 12. Finally, wear your smithing items and equip the Notched Pickaxe, drink your smithing potion, and improve any weapons and armor you have. You will, of course, need materials todoit,but most should be fairly easy to come by. You will probably reach the armor cap with any armor you're wearing, and increase your weapons to massive heights (more than 500), especially with any offensive skill enchants.
Notes on optimizing enchanting:
You can use these methods to increase your stats at any point, for any skill level, using this same method. However, you will benefit even more at higher levels, and should focus on leveling it,andyour other skills up, before optimizing. Even more powerful enchantments can be achieved by using an exploit connected to Fortify Restoration potions. The potions will increase any Restoration effect on an item, including Fortify Skill enchantments. By taking a Fortify Restoration potion prior to equipping Fortify Alchemy and Fortify Smithing items (or by taking several Fortify Restoration potions, since this exploit works on potions as well) you can increase the Fortify Smithing and Fortify Alchemy enchantment strengthonitems. Because the effect stacks with each potion taken (by un-equipping and reequipping the apparel after each potion taken), you can increase these enchantments exponentially and make exponentially more powerful Fortify Enchant potions with the Fortify Alchemy apparel.
All straight off of uesp.