Smelting
Originally in kTO this system was performed by Professor Komby who developed this new method.
The goal of this system: to get
Nate's Expander Potion or
Nate's Greater Expander Potion which can expand your equipment's slots up to 4 or 5 at Compounder Nate. (I don't know the difference between the two potions)
You can get these potions from the Grade Melting Boxes (sorry, the picture says Smelting :'D). There are 9 type of these boxes, the 1st Grade Melting Boxes are contain best and 9th Grade Melting Boxes contain the worst items.
You'll get one of the items from the boxes listed below
1st Grade Melting Box:
Requiem Marble x1
Altiverse Thorny Rose Box x1
Nate's Expander Potion x1
Nate's Greater Expander Potion x1
2nd Grade Melting Box:
Requiem Marble x1
Altiverse Twist Box x1
Altiverse Thorny Rose Box x1
Altiverse Maiden Queen Box x1
Altiverse Crimson Box x1
Nate's Expander Potion x1
Nate's Greater Expander Potion x1
1mil Galder Check x1
10k Galder Coupon x1
5k Galder Coupon x1
3rd Grade Melting Box:
Stage 2 Requiem Box x1
Stage 3 Requiem Box x1
Stage 4 Requiem Box x1
Stage 5 Requiem Box x1
Stage 6 Requiem Box x1
Requiem Marble x1
Altiverse Box (any kind) x1
Nate's Expander Potion x1
Nate's Greater Expander Potion x1
1mil Galder Check x1
10k Galder Coupon x1
5k Galder Coupon x1
4th Grade Melting Box:
Stage 3 Requiem Box x1
Stage 4 Requiem Box x1
Stage 5 Requiem Box x1
Stage 6 Requiem Box x1
Requiem Marble x1
Altiverse Box (any kind) x1
Nate's Expander Potion x1
Nate's Greater Expander Potion x1
2k Galder Coupon x1
5k Galder Coupo x1
10k Galder Coupon x1
5th Grade Melting Box:
Stage Requiem Box (any kind) x1
Requiem Marble x1
Altiverse Spiritual Box x1
Altiverse Twist Box x1
Altiverse Flash Bat Box x1
Altiverse Thorny Rose Box x1
Nate's Expander Potion
2k Galder Coupon x1
5k Galder Coupo x1
10k Galder Coupon x1
6th Grade Melting Box:
Stage Requiem Box (any kind) x1
Requiem Marble x1
Altiverse Spiritual Box x1
Altiverse Twist Box x1
Nate's Expander Potion
Worldly Cure x50
Twinkle Potion x50
Holy Chaos Box x1
Greater Chaos Box x1
1k Galder Coupon x1
2k Galder Coupon x1
5k Galder Coupon x1
7th Grade Melting Box:
Stage 1 Requiem Box x1
Stage 2 Requiem Box x1
Nate's Expander Potion
Worldly Cure x35
Twinkle Potion x35
Bad Chaos Box x1
Lousy Chaos Box x1
Decent Chaos Box x1
Greater Chaos Box x1
Holy Chaos Box x1
1k Galder Coupon x1
2k Galder Coupon x1
8th Grade Melting Box:
Stage 1 Requiem Box x1
Stage 2 Requiem Box x1
Nate's Expander Potion
Elixir Extract x35
Jewelry Potion x35
Worldly Cure x20
Twinkle Potion x20
Bad Chaos Box x1
Lousy Chaos Box x1
Decent Chaos Box x1
Greater Chaos Box x1
Holy Chaos Box x1
500 Galder Coupon x1
1k Galder Coupon x1
2k Galder Coupon x1
9th Grade Melting Box:
Nate's Expander Potion
Elixir Extract x1
Jewelry Potion x1
Bad Chaos Box x1
Decent Chaos Box x1
500 Galder Coupon x1
1k Galder Coupon x1
Compound Waste
You can get these boxes by smelting up to 5 equipments together. These EQs will be destroyed during the process so be careful (I tried to translate the windows below) The better the equip the better the points you can pull out of them

Grade Melting Box points table:
9th grade melting box: 300 points or less
8th grade Melting Box: 301 ~ 500 points
7th grade melting box: 501 ~ 700 points
6th grade Melting Box: 701 ~ 900 points
5th grade melting box: 901 ~ 1200 points
4th grade Melting Box: 1201 ~ 1500 points
3rd grade Melting Box: 1501 ~ 1800 points
2nd grade Melting Box: 1801 ~ 2100 points
1st grade Melting box: 2100+ points
What cannot be melted:
- pets
- drills
- equips below lv30
- form items
- absolute unique
- I believe 'old equipment' refers to those EQs which haven't got any stars therefore pre-revo items (I guess)
Note: I will wait for Planty to translate the pictures from the korean guide maybe they were more clever than japanese wiki. Points are determined by the following things:
- stars
- pontetial %
- number of slots
- refine level?
This is all I could pull out of those pages :'D